Add option for oblong mounting holes instead of 3mm circles

[benjiao]

Add option for oblong mounting holes instead of 3mm circles

[dromer]

Good idea, gives just a bit of wiggle room to position modules side by side (especially if you have fixed rails this can be tricky sometimes).

[benjiao]

Thanks! I forgot to close this issue. I don't see any downside to this so it's now the default for everything above 1HP.

[dromer]

nice!