I started with a Tower Trainer as well and it is a ok plane. The covering is that cheesy contact paper which does its job but it failed when I put an OS .46 on the plane.

IMHO the .46 is much more engine that this plane can handle assuming you are going to buy the arf.

When I put the OS on the plane and went to full speed during a banking turn, something broke on the right wing and it went spiralling down. I believe that I heard a "pop" then saw the contact paper on the top of the right wing flapping and the plane quickly when into a unrecoverable spiral.

Before the OS, I had a Tower Hobbies .40 on it and it ran fine. If you do put the .46 on it then set the throttle to not allow full speed. Better safe than sorry.

BTW, I love the OS .46. I have two of them now and think they are worth the extra money compared to other .45 or .46 engines.