Well, I got my RackMaster with loopmaster head the other day. It had a comfortable feel and looked good. However, when I went to operate it, things went downhill. After reading the instructions (only on adjusting, no instructions on operation) I could never get the release to 1) stay locked when pressure was applied & 2) when closed the trigger never would release the caliper. I don' t know if I did something wrong or if there was something wrong with the release. I contacted TRUBall and haven' t heard back. I stated the same as I did here and want to know whether to exchange for another release or simply return it.