Awww..I'm getting confused now. I'm off to the Jet Hopper thread
Front belt tension....
I noticed last night that there is a small raised piece molded into the upper rear gearbox housing where the screw that goes through to the(Pro) motor mount is. You will have to file the top deck slightly(1.5cm wide, Directly next to the motor side of the spur) otherwise this little molding will stop the top deck and rear upper gearbox getting any closer when adjusting the torque rod.
I only discovered this last night.