Does anybody have any real world data on this piston version of a vacuum
pump?

http://www.sigmatek.com/1U478-003/1U...troduction.htm

I do not have an installation that readily allows a wet pump, and most of
the folks on our field believe that dry pumps are the worst idea that have
been propogated on GA in a long time

Reliability?
Does it provide good vacuum comparable to rotary vane types?
How many hours do you have on it?

Thanks in advance

Doug