This is where all the metal additions start working against you. Lots of torque on a slow moving tank is fine - I get that - the Tiger 1 was a heavy beast and slow moving manoeuvres are more scale like with plenty of power. The modern tanks are fast moving so they need a motor/gearbox to provide this. I like the nylon stock gearboxes on these tanks as the speed is about right, power is good and they are quiet. In my opinion, adding metal to these modern tanks is a rainbow chase to get them running right. High torque gearboxes = slow speed = hotter motors to get the speed right which will pull more current and possibly blow your MFU so you need to upgrade the electronics as well. Adding more metal will only make this worse. I suspect most of us end up with a compromise but it does show you how this can get out of hand. I think this is where the Tamiya kits start to win and look cheap in comparison to a fully upgraded metal tank and their power to weight is excellent. Just an opinion.

cheers

CaptB