ran it yesterday. wicked hard to get both running at once. just needs some tuning. with both engines way out of tune, off the start it will roast all 4 tires for about 10 ft before it flips over backwards. This was on wet payvment. all I need to do now is a cupple little adjustments and I will be all set. Thing is wicked fast tho. The spurr gear already has some teeth missing. Cant imagine what the diffs look like. oh and I do have the gear mesh for the clutch and the spurr correct.