I am mentor for a High School based robotics team. We purchased an XL about a year back to help the team make robot parts. It took some while to get it setup and in the meantime, we have lost a Y Axis belt along with the clamps. We can buy belt that is no big deal but the clamps are not something sold separately. If you have a pair that you do not need, we would love to hear from you. We are ready to get this unit going but we are hamstrung at the moment.