mine seems to have become even more noisy over last few weeks to the point where its stating to sound like an atmospheric one!

What make is it? The Forge one is serviceable.

standard Bosch one.

Rich, just serviced my Forge one and put it back on i have 2 x Bosch ones at home if you want to try one before buying give us a shout

Phil

Mine made a fsh-fsh-fsh-fsh sound when letting off the throttle and didn't hold pressure when doing the pen test.