MPCNC F Z motor plate with bolts

This is a modified version of the MPCNC Z motor plate (model F 25mm).

The reason I modified it was that my original F-Z motor plate even when tightened down, slide off.

So I thought why shouldn't it be secured to the Z pipes like the spindle/etc's are?

so using openscad I imported the original model, sliced it into 3 parts, stretched the middle part, then put them back together (that was my version one, not posted here), but that covered up more of the motor shaft so I couldn't access