T.Q
I've had my Thunder Quake about a month now, love it. I was given good advice once--"soon as you get your r/c take it COMPLETLY apart & use loctite on ANY metel to metel part, DONT use on plastic, it will ruin it, I used "red" loctite on mine & I suggest maybe the "blue" type as I can't get a few set screws out now! after the 21 was broke in I bought a XTM 24.7, it bolts right in (make sure you get the "standerd shaft") man does that guy fly now, you can notice the power diff. right out of the box, after a careful break in & tuning the hsn that guy will roostertail all 4 wheels!!! (also make sure you get the NEW head with the 24.7 the 24.7 runs a little hotter than the .21) mines seems to be "cold blooded" as its slugish till it gets around 220-F, my steering seems to be fine w/the stock servo, I checked the turning without the servo & seemed a little stiff so I backed off the lock nut that holds the tie rod joint (#19) to the hub (#13) & check the pivot ball (27 & pivot ball nut #28), tighten the plastic nut till it gets almost tight then back off the nut 1/2 turn & recheck the steering, the 1/2 turn is a ball park figure, you want a little play in the ball joint without SLOP, works great, turns fast, hope this helps, Robie6