RE: xt2 possible servo problem?
Depends on your budget really. I presuming that it's a bit tight right now as you've sunk everything you've saved into getting your XTM, so: HRC32645S Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z $35.99
I've heard plent of good things about this one, but I haven't personally used it.