allright, i did some measuring on my mount setup. The distance from the LE of the cowl to the thrust washer is 11mm. The amount of cowl that slides over the fuse is 17mm, so it looks like I am right on the money with what you guys are telling me.

Let me ask another question. I mounted that plywood piece on the fuse. As far as positioning, I pretty much just guessed and centered the two holes the best I could (the hole in the plywood and the hole in the fuse). It looks like I am pretty close to where I should be, although maybe my engine could move to the right a little bit. Since I already drilled the mounting holes and everything, i am tempted to just leave it alone. It looks like the fuse has right thrust built in, but maybe I should put in some more with my magnum 108? Sorry for all these stupid questions, but i don't have a manual for this plane. Thanks/.