I’m still undecided about changing piston seal from the current PTFE to a parachute seal which I have ordered again after messing up the last new seal by oversizing !
but the parachute seal from new was such a tight fit was a job to get it into the cylinder, should I just push it in without sizing ? and let it bed in naturally? or do I stick with the original PTFE and buffer which seems to work okay at the moment.