Phillippe,
The oil bypass mod is easy, look at
http://forums.pelicanparts.com/showthread.php?threadid=106045&highlight=bypass+and+oil
I'm not sure why Wayne would say a compesssion increase decreases engine life, but the bypass mod can de done with a dremmel and a pistol drill, don't believe all that stuff about
requiring a milling machine
HTH
Neven