It's a long story, but somehow we ended up with 3 3D printers on our dining room table. The "Type A Machines" printer has always worked very well, so Cosmo and I use that one. The XL is promising but never quite worked right. Sitting next to one that worked very well, the XL never got any attention.
The Makers wanting a 3D printer, I told them the XL could be relocated to SIL, but only if they fix it. Great! It took Peter, Mini, and Chris some effort (a few hours over a few days), and I am happy to report that the XL now works!
They even modified the XL hardware. Peter chose to replace a certain part (a component of the Z-axis end stop switch) with a completely different design, which Cosmo printed on the Type A Machines printer. (Why does anybody need more than one 3D printer? Ahh!) After a few more hours of adjustments, the XL works!
If you want to use the 3D printer, make arrangements with one of the Maker Club members for a training session.