I had one of these for 18 month excellent model,had an irvine 53 in it with a tuned pipe and it went like stink,like i said it lasted for 18 month until the right hand side tail plane snapped off in flight at full throttle and in it went,so keep an eye on it especially if you are putting big motors in them. BTW they reviewed one in the uk with a SC52 fs in it and they said it was a good mach.
Ian