I acquired the snubby 923 from a friend after a day at the range where it was deemed unsafe as the sear was boogered up by a hack. I finally was able to find the proper sear and upon reassembly it locked up just fine. HOWEVER, the cylinder did not advance on either single or double action mode. I replaced the lever spring assembly (hand) to no avail. With the cylinder removed and with manual cocking of hammer, the lifter operates, the hand protrudes but seems to lack sufficient tension to turn the cylinder. Interior housing is clean and polished and everything is properly lubricated. Any ideas?? Thanks.