Guys, when you name a plane you MUST name a brand. There are probably 20 or more T28s out there. Big ones and small ones and kits and gassers and the like. Saying T28 says that you feel any T28 model from any maker is a good aileron trainer. I would not agree with this.
I happen to think the HobbyZone Super Cub is a great first RTF for self trainers. I have seen other Cubs and Super Cubs that were crap. And I have had my 11 foot wing spand glider towed into the air behind a Cub that weighted 20 pounds.