Hole expansion calibration model

Cura FINALLY got a setting that lets you calibrate the hole size of models so they no longer come out undersized. I imagine other slicers might have something similar.

Since this value changes from filament to filament, I made this small test print with a 10mm, 20mm and 30mm hole in it to help calibrate that.

**How to do it**
- Set any value of hole expansion that isn't 0(I'd say start at 0.05)
- Print this model using that setting

- Measure the hole with digital calipers(use the pointy jaws on the back of your caliper to measure the inside of holes)

- Take your expected hole size, divide it with your actual hole size and use that to find what to multiply with to get your new value.
***Example:*** Your hole measures 9.60mm and it's supposed to measure 10. Divide 10 with 9.6 and multiply your hole expansion value with the result.
10/9.6=1,04166666~
0.05*1,04166666=0.05208, rounded down to 0.052.

- Print again and make minor tweaks to get your hole completely r