The gear side of the rear roller on our SP15 will not lower enough to hit a roller-setting gauge. It does have a range of motion, just will not descend low enough to contact the gauge on the gear side. The roller measures about 1/8″ less than 2 1/2″ in diameter. The tip diameter of the gear is just under 2 5/8″. Would you advise re-casting the rollers in this case? Or is it possible the gear is slightly too large?