Ok, so my drive chain was really slack so I followed the manual instructions, loosened the brake pedal free play nut, the brake torque rod nut and the axle nut and then tightened the chain. As far as I can tell the rear wheel is aligned with the marks in the window being even. Then, as per the manual I tightened everything back up to within the manual specs. But now, the arm that links the brake pedal to the brake lever doesn’t return properly - it sticks and the rear wheel is sticking to the point it won’t move at all. I’ve tried a bit of WD-40 on the springs but that hasn’t helped. Any suggestions would be really appreciated. Thanks