X_Axis_BoxMount M3 wrong nut size

[anjoze]

The M3 nuts on X_Axis_BoxMount.STL are loose. I thought it was a chinese nuts problem but when I measure the holes of X_Axis_BoxMount.STL on Prusa slicer its 3.580mm.
Comparing it with Z_Axis_LinearRailMount M3 nuts (3.464mm), I see that they are bigger.
That difference make the X_Axis_BoxMount install process really difficult because the nuts are always spinning

This was discussed here:
https://discord.com/channels/795012056943296522/846512530004246558/1227605058942668851

[SnowB0und14]

I re worked that part and created a pull request for it. You should be able to find an updated file if you look there.

[anjoze]

Nice.