Here's 2 of my contact frames under my $50 tanning bed. I've had 3 frames under there at once and could fit more (or 1 or 2 REALLY big ones.) It seems a great waste of energy to put one contact print under there, so I always try to do a batch. The only difficulty being keeping track of which ones get 6 minutes, which 7 and a half, which 12 or whatever. Just have to stay organized and pay attention.
I seriously wondered about those and now I'm grinning seeing one in action