A series of thin shims with concave profiles matching the cylinder rod is supported from the cylinder. Couplers having a first side for attaching the coupler to the excavator arm and a second side onto which the accessory will be coupled. These straps are at least partially elastic and also include hook material pads on their ends. The connecting rod has a post for urging the elastic tab to move outwards. An evaluation rule is determined, and the seller offer information and the buyer offer information are matched based on the evaluation rule. The drape comprises a flexible tube having at least one open end and an elongated bandage.