diff --git a/perl/MYMETA.json b/perl/MYMETA.json
index 19043ba..d5e5979 100644
--- a/perl/MYMETA.json
+++ b/perl/MYMETA.json
@@ -43,5 +43,5 @@
       }
    },
    "release_status" : "stable",
-   "version" : "v2.0.1"
+   "version" : "v2.1.0"
 }
diff --git a/perl/MYMETA.yml b/perl/MYMETA.yml
index 0a89029..3f8ad2c 100644
--- a/perl/MYMETA.yml
+++ b/perl/MYMETA.yml
@@ -25,4 +25,4 @@ requires:
   Pod::Coverage: '0.23'
   Template: '2.26'
   Test::Fatal: '0.013'
-version: v2.0.1
+version: v2.1.0
diff --git a/perl/bin/brass-assemble b/perl/bin/brass-assemble
index 0a17107..a19413c 100755
--- a/perl/bin/brass-assemble
+++ b/perl/bin/brass-assemble
@@ -34,6 +34,7 @@ use File::Temp;
 use Getopt::Long qw(:config bundling no_ignore_case);
 
 use Bio::DB::Sam;
+use Data::Dumper;
 
 use Graph;
 use Graph::Reader::Velvet;
@@ -49,6 +50,7 @@ $0 =~ s{.*/}{};
 my %output_filename;
 my $output_format = 'tab';
 my $basedir = "working";
+my $extreme_bed;
 my $verbose = 0;
 my $clean = 0;
 my $genome_fa;
@@ -131,8 +133,6 @@ $bedpe = open_output($output_filename{bedpe}) if exists $output_filename{bedpe};
 $tab = open_output($output_filename{tab}) if exists $output_filename{tab};
 die "$0: VCF output not implemented\n" if exists $output_filename{vcf};
 
-my $graph_reader = Graph::Reader::Velvet->new();
-
 my $working_dir = File::Temp->newdir( "$basedir/tmpXXXXXX", CLEANUP => $clean );
 
 my $counter = 0;
@@ -197,6 +197,7 @@ sub assemble {
     my ($kept, $discarded) = $sample->write_local_reads($reads, @_);
     push @sample_names, $sample->sample_name();
     close $reads or die "$0: closing $fname failed: $!\n";
+system("wc -l $fname");
     print "Wrote $kept reads to $fname, discarded $discarded\n" if $verbose;
     if($kept == 0) {
       print "No reads found in sample $sample_names[-1] for assembly input ... skipping variant\n" if $verbose;
@@ -219,6 +220,7 @@ sub assemble {
     print "$k: graph has $_[0] vertices; n50 $_[1], max $_[2], total $_[3]\n"
       if $verbose;
 
+    my $graph_reader = Graph::Reader::Velvet->new();
     my $graph = $graph_reader->read_graph("$directory/LastGraph");
 
     ## TODO there is currently a bug in velvet and I think the read contributions are suspect...
diff --git a/perl/bin/brass.pl b/perl/bin/brass.pl
index 7cfdc45..ef4c9e7 100755
--- a/perl/bin/brass.pl
+++ b/perl/bin/brass.pl
@@ -85,6 +85,7 @@
 sub cleanup {
   my $options = shift;
   my $tmpdir = $options->{'tmp'};
+  system("cp $tmpdir/*.brm.bam $options->{outdir}/.");
   move(File::Spec->catdir($tmpdir, 'logs'), File::Spec->catdir($options->{'outdir'}, 'logs')) || die $!;
   my $basefile = File::Spec->catfile($options->{'outdir'}, $options->{'safe_tumour_name'}.'_vs_'.$options->{'safe_normal_name'});
 
diff --git a/perl/bin/brassI_prep_bam.pl b/perl/bin/brassI_prep_bam.pl
index b1574a9..6fda34f 100755
--- a/perl/bin/brassI_prep_bam.pl
+++ b/perl/bin/brassI_prep_bam.pl
@@ -2,21 +2,21 @@
 
 ########## LICENCE ##########
 # Copyright (c) 2014 Genome Research Ltd.
-# 
+#
 # Author: Cancer Genome Project <cgpit@sanger.ac.uk>
-# 
+#
 # This file is part of BRASS.
-# 
+#
 # BRASS is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free
 # Software Foundation; either version 3 of the License, or (at your option) any
 # later version.
-# 
+#
 # This program is distributed in the hope that it will be useful, but WITHOUT
 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 # FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 # details.
-# 
+#
 # You should have received a copy of the GNU Affero General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 ########## LICENCE ##########
@@ -30,7 +30,6 @@
 use strict;
 use warnings FATAL => 'all';
 
-use Bio::DB::Sam;
 use Capture::Tiny qw { capture };
 use PCAP::Bam::Bas;
 use List::Util qw(first);
diff --git a/perl/docs.tar.gz b/perl/docs.tar.gz
index b6a66f3..8d57d46 100644
Binary files a/perl/docs.tar.gz and b/perl/docs.tar.gz differ
diff --git a/perl/lib/Bio/Brass.pm b/perl/lib/Bio/Brass.pm
index 43eb166..5499e57 100644
--- a/perl/lib/Bio/Brass.pm
+++ b/perl/lib/Bio/Brass.pm
@@ -36,7 +36,7 @@ our @EXPORT = qw(find_breakpoints find_dusty_vertices
 		 is_dusty get_isolated_bp_alignment get_isolated_bp_surrounding_region
 		 $VERSION);
 
-our $VERSION = '2.0.1';
+our $VERSION = '2.1.0';
 
 =head1 NAME
 
diff --git a/perl/lib/Bio/Brass/ReadSelection.pm b/perl/lib/Bio/Brass/ReadSelection.pm
index 1ab82ab..90c012d 100644
--- a/perl/lib/Bio/Brass/ReadSelection.pm
+++ b/perl/lib/Bio/Brass/ReadSelection.pm
@@ -31,6 +31,7 @@ use List::Util qw(first);
 use File::Spec;
 use File::Temp qw(tmpnam);
 use Bio::Brass qw($VERSION);
+use PCAP::Bam::Bas;
 
 =head1 NAME
 
@@ -120,6 +121,7 @@ sub new {
       }
       $sample_names{$1}++    if(/\tSM:([^\t]+)/);
     }
+    $max = insert_from_bas($filename) if($max == 0);
 
 	warn "Multiple sample names detected in |$filename|" if scalar keys %sample_names > 1;
 
@@ -131,6 +133,27 @@ sub new {
     return bless $self, $class;
 }
 
+sub insert_from_bas {
+  my $filename = shift;
+  my $max_mi = 0;
+  my $bas = "$filename.bas";
+  if(-e $bas && -s _) {
+    my $bas_ob = PCAP::Bam::Bas->new($bas);
+    my @groups = $bas_ob->read_groups;
+    for my $rg_id(@groups) {
+      my $mean_insert_size = $bas_ob->get($rg_id, 'mean_insert_size');
+      my $insert_size_sd = $bas_ob->get($rg_id, 'insert_size_sd');
+      my $mi = int( $mean_insert_size + (2 * $insert_size_sd) );
+      $max_mi = $mi if($mi > $max_mi);
+    }
+  }
+  return $max_mi;
+}
+
+sub maxmaxins {
+  return shift->{maxmaxins};
+}
+
 sub DESTROY {
     my ($self) = @_;
     if (exists $self->{unlink_base}) {
@@ -160,8 +183,8 @@ quality mapping of the single end.
 sub _get_reads {
   my ($self, $chr, $pos5, $pos3, $strand, $k, $q, $abort_reads) = @_;
 
-  my $normalpos5 = $pos5 - $self->{'maxmaxins'};
-  my $normalpos3 = $pos3 + $self->{'maxmaxins'};
+  my $normalpos5 = $pos5 - $self->{maxmaxins};
+  my $normalpos3 = $pos3 + $self->{maxmaxins};
 
   my $mutpos5 = ($strand eq '+')? $normalpos5 : $pos5;
   my $mutpos3 = ($strand eq '+')? $pos3 : $normalpos3;
@@ -234,7 +257,7 @@ sub write_local_reads {
   my ($self, $out, $chrl, $lstart, $lend, $chrh, $hstart, $hend,
 	    undef, undef, $strandl, $strandh) = @_;
 
-  my $abort_reads = 500_000;
+  my $abort_reads = 20_000;
   my ($k_reads, $q_pairs) = ({},[]);
 
   my ($k1, $d1) = $self->_get_reads($chrl, $lstart+1, $lend, $strandl, $k_reads, $q_pairs, $abort_reads);
diff --git a/perl/lib/Sanger/CGP/Brass/Implement.pm b/perl/lib/Sanger/CGP/Brass/Implement.pm
index 9f4ca45..6bbdf56 100644
--- a/perl/lib/Sanger/CGP/Brass/Implement.pm
+++ b/perl/lib/Sanger/CGP/Brass/Implement.pm
@@ -42,10 +42,11 @@ use File::Copy qw(move);
 use PCAP::Threaded;
 use PCAP::Bam;
 
-const my $ASSEMBLE_SPLIT => 100;
+const my $ASSEMBLE_SPLIT => 30;
 
 ## input
-const my $BAMCOLLATE => q{ outputformat=sam exclude=PROPER_PAIR,UNMAP,MUNMAP,SECONDARY,QCFAIL,DUP,SUPPLEMENTARY mapqthres=6 classes=F,F2 T=%s/bamcollate2_%s filename=%s};
+const my $BED_INTERSECT_V => q{ intersect -ubam -v -abam %s -b %s };
+const my $BAMCOLLATE => q{ outputformat=sam exclude=PROPER_PAIR,UNMAP,MUNMAP,SECONDARY,QCFAIL,DUP,SUPPLEMENTARY mapqthres=6 classes=F,F2 T=%s/bamcollate2_%s};
 # tmpdir, iter, file
 const my $PREP_BAM => q{ -b %s};
 # basfile[ -e exclude chrs]
@@ -67,7 +68,7 @@ const my $BRASS_FILTER => q{ -seq_depth 25.1 -blat %s -ref %s -tumour %s -infile
 
 ## assemble
 const my $BRASS_ASSEMBLE => q{ -X -m mem -O bedpe -r %s -T %s -o %s %s %s:%s.bai %s:%s.bai};
-# genome.fa, tmp, output.tab, groups, tumourbam, tumourbam, normalbam, normalbam
+# extreme depth, genome.fa, tmp, output.tab, groups, tumourbam, tumourbam, normalbam, normalbam
 
 ## grass
 const my $GRASS => ' -genome_cache %s -ref %s -species %s -assembly %s -platform %s -protocol %s -tumour %s -normal %s -file %s';
@@ -93,8 +94,11 @@ sub input {
     my $outbam = File::Spec->catfile($tmp, sanitised_sample_from_bam($input));
     $outbam .= '.brm.bam';
 
-    my $command = _which('bamcollate2');
-    $command .= sprintf $BAMCOLLATE, $tmp, $index, $input;
+    my $command = _which('bedtools');
+    $command .= sprintf $BED_INTERSECT_V, $input, $options->{'depth'};
+    $command .= ' | ';
+    $command .= _which('bamcollate2');
+    $command .= sprintf $BAMCOLLATE, $tmp, $index;
     $command .= ' | ';
     $command .= "$^X ";
     $command .= _which('brassI_prep_bam.pl');
@@ -177,14 +181,13 @@ sub split_filtered {
   my $tmp = $options->{'tmp'};
   return 1 if PCAP::Threaded::success_exists(File::Spec->catdir($tmp, 'progress'), 0);
 
-
   my $groups = File::Spec->catfile($options->{'outdir'}, $options->{'safe_tumour_name'}.'_vs_'.$options->{'safe_normal_name'}.'.groups.filtered.bedpe');
 
   my $split_dir = File::Spec->catdir($tmp, 'split');
   remove_tree($split_dir) if(-d $split_dir);
   make_path($split_dir);
-  my $command = sprintf 'split --suffix-length=6 --numeric-suffixes --verbose --lines=%s %s %s/split.',
-                        $ASSEMBLE_SPLIT, $groups, $split_dir;
+  my $command = sprintf q{grep -v '^#' %s | split --suffix-length=7 --numeric-suffixes --verbose --lines=%s - %s/split.},
+                        $groups, $ASSEMBLE_SPLIT, $split_dir;
 
   PCAP::Threaded::external_process_handler(File::Spec->catdir($tmp, 'logs'), $command, 0);
 
@@ -206,13 +209,13 @@ sub assemble {
 
     my $split_dir = File::Spec->catdir($tmp, 'split');
     my $split_file = File::Spec->catfile($split_dir, 'split.');
-    $split_file .= sprintf '%06d', $index-1;
+    $split_file .= sprintf '%07d', $index-1;
 
     my $tmp_assemble = File::Spec->catdir($tmp, 'assemble');
     make_path($tmp_assemble) unless(-e $tmp_assemble);
 
     my $assembled = File::Spec->catfile($tmp_assemble, 'bedpe.');
-    $assembled .= sprintf '%06d', $index-1;
+    $assembled .= sprintf '%07d', $index-1;
 
     my $command = "$^X ";
     $command .= _which('brass-assemble');
diff --git a/setup.sh b/setup.sh
index 59406ce..64973d2 100755
--- a/setup.sh
+++ b/setup.sh
@@ -2,27 +2,28 @@
 
 ########## LICENCE ##########
 # Copyright (c) 2014 Genome Research Ltd.
-# 
+#
 # Author: Cancer Genome Project <cgpit@sanger.ac.uk>
-# 
+#
 # This file is part of BRASS.
-# 
+#
 # BRASS is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free
 # Software Foundation; either version 3 of the License, or (at your option) any
 # later version.
-# 
+#
 # This program is distributed in the hope that it will be useful, but WITHOUT
 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 # FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 # details.
-# 
+#
 # You should have received a copy of the GNU Affero General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 ########## LICENCE ##########
 
 
 SOURCE_BLAT="http://users.soe.ucsc.edu/~kent/src/blatSrc35.zip"
+SOURCE_BEDTOOLS="https://github.com/arq5x/bedtools2/releases/download/v2.21.0/bedtools-2.21.0.tar.gz"
 
 done_message () {
     if [ $? -eq 0 ]; then
@@ -92,20 +93,6 @@ echo > $INIT_DIR/setup.log
     echo; echo
 ) >>$INIT_DIR/setup.log 2>&1
 
-perlmods=( "Graph" )
-
-set -e
-for i in "${perlmods[@]}" ; do
-  echo -n "Installing build prerequisite $i..."
-  (
-    set -x
-    $INIT_DIR/perl/bin/cpanm -v --mirror http://cpan.metacpan.org -l $INST_PATH $i
-    set +x
-    echo; echo
-  ) >>$INIT_DIR/setup.log 2>&1
-  done_message "" "Failed during installation of $i."
-done
-
 set -eu
 
 # cleanup inst_path
@@ -121,12 +108,51 @@ PERLROOT=$INST_PATH/lib/perl5
 PERLARCH=$PERLROOT/$ARCHNAME
 export PERL5LIB="$PERLROOT:$PERLARCH"
 
+CHK=`perl -le 'eval "require $ARGV[0]" and print $ARGV[0]->VERSION' PCAP`
+if [[ "x$CHK" == "x" ]] ; then
+  echo "PREREQUISITE: Please install PCAP-core before proceeding: https://github.com/ICGC-TCGA-PanCancer/PCAP-core/releases"
+  exit 1;
+fi
+
+perlmods=( "Graph" )
+
+set -e
+for i in "${perlmods[@]}" ; do
+  echo -n "Installing build prerequisite $i..."
+  (
+    set -x
+    perl $INIT_DIR/perl/bin/cpanm -v --mirror http://cpan.metacpan.org -l $INST_PATH $i
+    set +x
+    echo; echo
+  ) >>$INIT_DIR/setup.log 2>&1
+  done_message "" "Failed during installation of $i."
+done
+
 #create a location to build dependencies
 SETUP_DIR=$INIT_DIR/install_tmp
 mkdir -p $SETUP_DIR
 
 cd $SETUP_DIR
 
+echo -n "Building bedtools ..."
+if [ -e $SETUP_DIR/bedtools.success ]; then
+  echo -n " previously installed ...";
+else
+  cd $SETUP_DIR
+  (
+  set -x
+  if [ ! -e bedtools ]; then
+    get_distro "bedtools2" $SOURCE_BEDTOOLS
+    mkdir -p bedtools2
+    tar --strip-components 1 -C bedtools2 -zxf bedtools2.tar.gz
+  fi
+  make -C bedtools2 -j$CPU
+  cp bedtools2/bin/* $INST_PATH/bin/.
+  touch $SETUP_DIR/bedtools.success
+  )>>$INIT_DIR/setup.log 2>&1
+fi
+done_message "" "Failed to build bedtools."
+
 echo -n "Building blat ..."
 if [ -e $SETUP_DIR/blat.success ]; then
   echo -n " previously installed ..."