hi well, i have a chris foss primary trainer and me and my co-conspiriter have decide that to save some dosh and have abit of fun, we would put a 2.5cc engine in the front and move all the flight gear back but we need help,has anyone done this sort of thing before?? anyy measurements or mathimatic stuff that we could use to with CG and so on would be appreitated p.s would timbo put this in to the right catigory coz i don't know where it goes pp.s no smart ass coments this is serious