4*60 with TT.61??
I have the 4*60 ARF and my flying buddy has the kit. I can't tell any difference in how they fly. I had the red one but I didn't like the color so I removed it and recovered it in blue and yellow. I got the ARF second hand and got a great deal on it. Mine has a TT 61 engine on it also. I started off with a K&B 65 on it and did not like the way it flew. i changed engines to the TT and It is great. It has lots of power with a Master Air screw 12x6 scimitar prop. I am going to try a 13x5 or 13x4 prop on it this weekend. The thunder tiger motors run great and have not given me any problems. I had to add about 3 1/2 oz of weight right behind the aft wing mount to get it to balance. If you build from a kit you can get it to balance by just moving the gear around inside. I tried but still had to add weight to mine. It flies great very stable. I flew it for 4 hours yesterday and had no problems. The more I fly this plane the more I like it.
Rick