In a message dated 4/5/2012 9:09:04 A.M. Pacific Daylight Time, val at mongo.mongobird.com writes: It's a pain, and it just barely works. I was happy to get rid of the shims on the 1.5 when I transitioned to the 1.6 engines. All my 1.6 engines still have the same shims as the 1.5 so it's not THAT easy to get away from them! :-D Loren