http://stores.overlandwarehouse.com/...sor/Detail.bok

i got this pump after seeing it at pismo about a year ago. its been very nice and used alot. its really a shade faster then a mv-50 or tsunami 1050 (little red pumps) but its also smaller. well i ended up doing 2.25 trucks in a row last night so i figured it was time to take it apart and fix anything overly chineased inside.

quality:
-fake cylinder fins
-crud in the bottom end
-no need for the air holes on the back side of the switch
-cylinder head screws loose

design:
-large bore for the short stroke
-very large intake and exhaust for the cylinder size.
-one valve on the piston and one in the head

i ended up stripping it down after finding out the fins were doing nothing. i can imagine this will mean better cooling but also exposure to the extremely hot surfaces. the significant thing i found other then the efficient design is that this thing is tiny after you strip all the fake junk off it. its a good candidate for installing behind a interior panel.
heres a video of it stripped down
VID00004