X-End Carriages with clearance for Z couplers for Zaribo/Haribo

OK, y'all, here's my hack for those of you using couplers on your Z motors. This is based on the previous Zaribo X-End (sorry, I got started before Wolfgang Schadow posted the new one), so you don't get his new gussets and top exit wiring. But what you do get is the ability to use a coupler (max size 20mm diameter, 25mm long) to connect your leadscrews. The pitch between the smooth rods and leadscrews is unchanged, so you still use the stock Zaribo Z motor holders and Z-top parts. There are thre