Steve, here's the link to my booth topic. It'll show you how I was able to match everything up. It's gone through several modifications since I first posted this. I've added lights everywhere and moved the filter location. The bilge blower, ducting and hook ups remain the same except that I don't use the board under the door as an exhaust any more. I put a vent into the door. The blower I have is adequate but I'd buy more capacity if I had it to do over. You can get 170 CFM blowers for about the same price that I paid for the 100 CFM on eBay. I can spray continuously for about 3 minutes before the cloud of spray is visible in the booth. After a couple of minutes, it's clear again. I still haven't decided whether to change it or not.
http://www.modelcarsmag.com/forums/index.php?showtopic=76088