After I bought the rig (used but semi-new DOM 2015) it was grounded. I did never jumped on it; never! Therefore, it is not possible for me to assess the material. The grounded rig was sent to Parachute Systems as fast as possible! I think it is not correct that old rigs will bee replaced before my newer one! warranties???? The delivery time was repeatedly delayed. Because false promises about the delivery date I bought no other one. Had I never bought this rig!