I'm having intermittent rear trigger/hammer cocking or releasing, and it seems sharply snapping the gun closed sets or knocks something into place so it fires twice. It's a 1928 16 gauge featherweight. How hard is it to remove the side locks to clean the action? It behaves as if it is dry or crusty, rather than something being broken or worn. I had the great Dennis Potter go through it and do a complete overhaul a year ago, and I have shot at least 1500 RST rounds through it hunting and at clays.