Have a problem with my Maverick DUC 32's. During a ride they gradually get lower and lower. Air pressure remains constant - so the main cartridge is not leaking. I have stripped them down and without the air chamber in the left leg assembled they move with full travel. I have to compress them to be able to screw the shrader valve into the top of the air cartridge and then I cannot extend them afterwards, even when I pump them upto 150psi.. What am I doing wrong? The manual doesn't give any clues! Also where should I get them serviced? I live near Bristol...
Thanks!

