i have two bishops now and two on the way (love these things) and was going to change pics out and lube both. first one no prob motor was pushing rca plate off with only one of the two screws off. motor dropped easy went back together the same way. second one took all four screws off and couldnt get the back plate off!! i even jiggled the swing bar till i felt the bear drop, the motor was completely free at that point but this plate wont give. Any suggestions i dont want to mess this machine up!!