Tom, truth be told I've already got the Ultracast seat
, it arrived a while ago from GM. Tell me (and I think I've asked this before) was your Martlet the Hase offering or the one from Tamiya?
Bob, great idea with the CO2 cylinder, just remember you need some way to fill it. On the spray booth, I don't have one myself I've never found the need. For ventilation I make sure the window is open when I spray and overspray is not an issue as the trusty ab operates at far less pressure than a rattle can which eliminates any issues. All I do is lay a piece of newspaper over my cutting mat and spray away.
Cheers
Darren