I want to get the ultimate version 2 gear box with hi torque motor, after some home work just now. I need Med-Low, long shaft type.
It seems there is very few vendor carry just that type.

I truly want to upgrade to ultimate verison, I believer the pot-metal gear is dead not only because of the gear itself loose true, but the brass washer loose true too. There is too much to upgrade in henglong, everything except the hull is in list of changing, so let's get done in one shot.