Well with me there is a fine line.
I would run a mini-Z aftermarket motor but not a stock one and the same type batteries or better and then there are the nuts/bolts/screws would be ok for me but no major mini-Z parts like bodies/drivetrain/electronics.
The wheels/tires are difficult because the mini-Z's might have a tire out that hooks up well at a certain track and that could make a big difference but I'd still run Xmod wheels/tires.
This is the aluminum version and I am still having problems stuffing it all under the bodies I may have to lose the motor heatsink and lower the receiver deck.This is still a ways off. It still has stock suspension a front axle that was not cut right and I want the bodies to fit right.The supra is way off the civic is very very close and I havnt tried the RSX yet.To get it to work I will most likely have to go to lithium polymer batteries.