Well I've had my Sizer for a day now and already mod'd it. I put the turbo ZZ motor in with the stock gear that came with the Sizer. Its probably twice as fast but not flip on a turn fast that I'm after. My next two motors will be the ZZ NOS and the 3.6 for the Sizers. That should give me flip on the turn fast
You gota kinda cram the motor in and tweak the heat sink a bit. I'm going to make a new heat shield for my Sizer. One that will fit with the ZZ motors and not have to put torque on the idler gear axle. All the heat sink is is a peice of aluminum so it shouldn't be hard to come up with a custom design.
Also I think this lil hobby will get me back into model car building!