no offence mate but by the sounds of it your not a tech?am i right?i will also no doubt be able to change o-rings, and flag defective/worn parts of the marker
so with that in mind i doubt people would want you to be takin £600 markers appart to try and source a leak or problem.just my 2pence
good idea tho but think there has been a thread on this before,but they didnt want to be paid
EDIT;-BEAT ME TO IT
You're so last year, i offered this service way back and allthough everyone thought it was a good idea, no one has shown any interest, and i wasn't charging £10 a go.