I would not reccommend the Tower Trainer. Here are some of the things I do not like about it. I bought the ARF so I could continue flying/learning when My PT-40 was damaged. First, the tank is pretty large and is installed into the formers with rubber on the inside edges. unless you cut a hatch, there is no way to get at the tank or get it out without removing the engine. Second, the engine is not bolted directtly to the engine mount, it uses metal straps over the lugs and these are bolted to the mount. Third, the fuel lines exit the firewall inside the engine mount and routing them to an engine other than a Tower .46 is a little awkward. The Tower engine has the remote needle valve pointing up where mine points inward, paralell to the firewall and it was a pain removing the fuel line. These problems/annoyances can be rectified, but why bother. You could eliminate the remote needle valve and use the standard location, but then you will have to cut the fuse so you can get at it. I had trouble getting my fingers in to attach/remove the fuel line for filling. I cut the fuel line and installed a piece of brass tubing and added another line so I could fuel the plane easier, made it longer and was more accessable. It is heavier than the PT-40 (kit built) and I don't think it is as easy to fly. Maybe I am just use to the PT. The trim will need to be attached/repaired constantly, I finally used Balsarite to adhere it and seal the edges. I am not familiar with the other ARF trainers so I can't comment on them, but I would not buy another Tower Trainer ARF for the reasons stated.