We just recently did a complete re-build on our Prochem Performer - engine out, blower etc frame stripped, powder coated, the whole nine yards - I cannot believe the increase in pleasure in getting to a job this brings in the morning - the accumalator bladder was completely k-nackered - it was stripped down and the bladder was replaced with new one from Speck Pumps UK Ltd High Wycombe 27 quid - now works like it should do - no RSI from wanding with big burst of pressure everytime you pull the trig! serious pain in arm on big jobs! - trigger is soft and gentle now - get it done 'properjob' is my advice