Thanks for the response! That sound pretty reasonable, I would likely use gearboxes for those 25mm brushed motors. This would require that I either turn down the NTM motor shaft or widen cog hole that attaches to the motor. I don't relish the prospect of either of those. I would also have to find a way to mesh the gearbox to the motor, all an expense that will quickly erode the price of the NTM motor.