My first Redcat was a Dunerunner when it first came out. It was too heavy to be responsive like the other 4WD buggies back in the day. I swapped to the MT chassis to make it a TT which ran great. Due to the lack of aftermarket TT body options, I converted it to a MT. The MT runs perfectly for me. The only issue to to be prepared for are broken drive cups. They will break sooner or later...no biggie as parts are readily available. Check the Redcat forum for more specific discussions.