Hello! Gotta quick question. I want to change a 40" wing Tower Hobbies trainer from gas to electric. My brother built it over 20 years ago, and has never been flown. He passed away 13 years ago, and I took position of it. It is a .40 engine. was looking at your powerpacks and wondered if the "C" pack would be big enough for it. Kinda starting over you could say, I flew alot of control line,and old single channel R/C in the 70's when I was 13-14 years old. I'm 61 now and would like to see this old bird fly. Thanks