Well glad you are having fun putting this plane together as I think Sig is the best company so far compared to G/P. My plane went together so fast and was wanting to put together another Sig, but they will come shortly as I have 2 G/P's to put together first. Yeah those mods by Tom Pierce are excellent ideas and really makes the 4* stick out. As far as the mounting of the engine are you gonna do it with a the cowl mod or without? I did mine without the nose job and went with the Thrustline. So I would probably have to tell you that if you are gonna do a nose job to contact Tom or maybe someone else here can answer that question.

Hope this helps out. And enjoy...