Since I have finally sold the machine that was sitting where this machine will go, and I'd like to get the base and epoxy done while we have reasonable weather, I've been making a point of adding at least one component to F360 every night, starting with the spindle and working from there.

This is the current basic layout, so I can get a better idea of how things will be positioned.
Click image for larger version.  Name: 210607_First layout.png  Views: 188  Size: 89.2 KB  ID: 30048

I have managed to misplace the notebook I had my previous sketches in, so have had to start from scratch.
The spindle is modelled around a 5.5kw ATC spindle. The machine may start life with just a basic 2.2kw, but I'd like to get something with an ATC at some point.

Profile is Kanya 80x160.
Rails are Hiwim 20mm.

Does anybody have a reliable source for 3D models of ballscrews and support bearings, that doesn't involve endless searching for something that might not be the correct size?
For ballscrews I'm currently thinking 1620 or 2020, depending on what fits in best.