Yea found that motor mount and top plate on ebay, only thing I really fabbed up was the battery tray. The tray came out better than I expected. Paint was Spazstix color change paint, $12.00 a can but worth it imo. The electric weighs 4lbs. 10oz., the nitro weighs 4lbs. 5oz. without fuel.
I also noticed that the top plate is adjustable to allow the bulkheads to sit father apart. I am guessing this is to allow use of the plastic kyosho spur gears.
Did'nt think about that pimp. The only problem I have with the motor mount plate is it's thick. The 18 tooth pinion I have on there barely fits without hitting the motor mount screws, don't think a 20 tooth will work. But it fast enough with the 18 tooth. Ballons the tires all the way down the street.