I called Summa for my first time a couple of weeks ago. Holy crap, I didn't expect what I got from them. I've got a,new to me, used plotter and I've never seen or used a Summa. I just had one simple settings question. 35 minutes later, the guy was still talking to me. I wanted to replace the belt because it's old and seemed dried out. He told me in all his years, he's never seen that belt need to be replaced like I was doing, and recommended that I leave it be. Then he told me the things to look for, what the signs, symptoms, and fixes would be if I started seeing them.
Probably the best tech support call I've ever had. I know where my next plotter will come from.