Tim I've never had a two ring Fox, but on my single ring ones the ring wonders around some, sometimes its visible in the exhaust port and sometimes not not. Neither of my .50s have Bowman rings yet. I have them in a SuperTgre 4500, 3000, .90 and a Webra .91. I have an old SuperTigre .51 that will get the next Frank Bowman ring I buy. Your .50 should come to the front with about an hours running. Some say much longer but that hasn't been my experience. Mine were broken in on Fox all castor fuel. Sadly Fox no longer makes fuel.