ORIGINAL: swathdiver
You get the new low profile high torque gear boxes that come with high rpm 280 motors. OR You get the other new high torque gear boxes and install Graupner Speed400s in them. You will have to modify the interior slightly to make them fit, they are a little longer then the originals.
I've seen the low profile gear boxes (from TamToys, I think) in previous posts. Don't remember seeing any other new gear boxes. Do you have a link?
Has anyone tried the new low profile gear boxes and how are they?