I then measured for centerling on the engine and also clearance for my prop(s) and mounted the cowling without the engines muffler..
THen using the old measuring trick using wood or cardboard I spotted where to make all the cuts and openings for the muffler, GlowPlug Ni-Starter...and I dremeled them out... I also started to "butcher" the radial engine cover so that I could use it with the ST G90... I DID have to Remove quite a bit of It but I think It will workout nicely when I finish detailing it.. I also cut out a lite-ply radial engine backplate to provide more rigidity and lifespan to the plastic engine cover..I will go into greater detail on this little gem later..