Don't be afraid to call Sig Mfg. either. I have built two of their kits in the past year and have needed extra parts at times. If you don't have the plans, you may want to order them. It will really help you see where things go and how they go together. Sig has always been helpful to me over the past year and a half. I even call them sometimes to just get building advice.

I have the LT-40 and have flown it for the last year. It is a great plane to start with. I have an OS LA 40 engine. It has been reliable and a good match for beginner ability and the plane.

Also, look up the "Pay It Forward" build post by RCKen on this site.It was unbelievably helpful to me when Ibuilt my LT-40.

Good luck with it!