I don't know about that Mike, although certainly probably deeper down that a sponge.
Greenie, big blower, high heat, Mach 11 most of the time I'm sure, never bought
butler hoses (vac or pressure - this has got to be the 5th or 6th time I've said that). Most guys use a 10-15 foot 1 1/2" whip I believe.
Dave Bidinger does have your info also and I think was going to call you early next week if he hadn't heard from you. We are close, and have received color samples and quotes from at least 2 hose manufacturers so far. As for the other questions, Dave would be better equipt mentally to answer, I'm a little technically challenged. When people start talking vac relief, stuff and other mechanically technical stuff my eyes start to gloss over and I want to start talking about the subtleties of managing/profiting from foreign currency fluctuations, and debate depreciation schedules and investigate trial balance irregularities :-)
Ken