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So I don’t know if any one else has tried this little trick to increase rigidity?
I modified the middle z rigid to not have a Z component and added it to the opposite cross section.
This made a huge difference for CNC cutting using a 52 mm 300 watt spindle from inventables, off my old shapeoko
Back cross section

The trade off is that it increases dead space but definitely worth it.

I have published the new middle Z Rigid that does not contain the Z component.
New Middle Z on thingyverse

Note this could be done by also reprinting a second middle assembly but without the component above it increases the dead space

Just curious if anyone else has tried this I’m seeing really good results.