That's a good synopsis of the phenomenon, Fax. For Stitch, Tippman guns by simple virtue of their design are a bit more tolerant of strange angle firing. It's quite a hike up to the valve assembly, so that's more room for expansion, and there's not much going on in the way of O-rings in that area for the freezing to effect negatively. The 98 and A-5 are pretty much the same that way.

BTW - I was diagnosed with Strep Throat today. I've got a perscription now that should help me kick this bug that I've been fighting for 3 weeks. :P