You can put duct tape on the axle adjusters, or, better idea: align the rear axle properly! Here is how:
Put it back together, but leave axle hand tight. With the wheel off the ground a bit, spin wheel by hand. If the belt migrates on the pulley, it is not square. Spin the wheel backwards. I do ten revolutions each way. The manual says up to 3/16th" migration is ok. Turn the Allen head bolts until it does not migrate. Once you are sure it is aligned, torque the axle to 95 foot pounds. Done! The trouble with the tape idea is you could keep it from moving, but is it right? Don't guess! KNOW!
While you are at it, check tire pressure. Most are off. Call if you get stuck. Joe