We have one educator and one portable, but I've gone out as an emergency backup before. We're also in the "schedule us and we'll come" camp, and have been mucking our way through some similar situations.
1. We don't really have a cap. This is our...
Yeah, I thought the other Mike (the younger) that I worked with had an even stranger last name than Smail. How many Mikes can there be in one organization of that size? Geez, guys!
I remember that I could not get it to output anything larger than the resolution of my desktop. But I got around that by shifting the center of the starfield on the screen. In that way, I piecemealed a large, say 4096x4096, starfield down into smaller sections. After outputting all the sections, I put back together them together in Photoshop. Hooray for Photoshop Actions and Batch processes!
By the way, nice avatar. I recently got the idea to make a 8-bit self portrait. If I ever do, I will replace my current image.