Just for reference, this is my (not finished) model of machine im trying to build. Gearbox here is from AvidCNC, just for example.
It will be made of 80x80 80x160 aluminum extrusions from Item24.
Click image for larger version. 

Name:	2020-12-24-002.png 
Views:	760 
Size:	399.3 KB 
ID:	29284Click image for larger version. 

Name:	2020-12-24-003.png 
Views:	728 
Size:	733.4 KB 
ID:	29285Click image for larger version. 

Name:	2020-12-24-004.png 
Views:	714 
Size:	178.8 KB 
ID:	29286