Better 3D models for index ring

[H1D]

Hi there! A few nitpicks over the ring STLs:

1. size numbers are neat! But the font size is too small. Here is what it looks like in standard most common FDM slising (0.42 line, 0.2 layer):

2. Prefer engraving over embossing. I've printed an example. Embossing looks a bit cleaner, but IRL engraving is way more readable:

👆the tiny bumps on the left represent the original number

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I would be happy to fix and send a PR, but you've shared only STL so far. Not the CAD files.

For now here are example .3mf and STL:
https://gist.github.com/H1D/a82a424f718b89a54d844bd0bfd9dbdc

[luciancd]

I manipulated the STLs using Fusion and made a PR