Yes basically it runs a treat on air so my grandfather and I worked out that it has to be the orings going soft when hot so they are coming out and being replaced by the correct material grafite yarn which should get things moving along nicely not really a big job either one afternoon should do it I have the yarn already so just need some time

Ask and ye shall receive I got some spare time so I got to fixing butch
Removed the end covers

The offending item the dreaded o-ring

The new old school seal

The grafite yarn on the piston

And,,,,,,,,,,,, it works a treat
Totally transformed it, lesson learnt don't deviate from the original unless you have to
Now I can look forward to a running loco on the track just got a safety test to get through next
TBC