[brushlessboy16]

the 15xx and 14xx series are 540 sized, i doubt that the 11 series will provide any more performance then the mm5700... it will probably be worste because its a smaller, shorter motor.

Best bet for the tc4 might be a 1506 and a 1509 for the .5.

Also look into medusa motors, they make a great motor....if you like blue ;)