the webley fx2000 is easy to service mate, i have one and service mine myself. just make sure all the air is out first. try the fx owners club theres loads of info on there.
http://www.fxoc.info/
http://www.fxoc.info/viewtopic.php?f=27&t=449
http://www.fxoc.info/viewtopic.php?f=10&t=129
dan.