Hi all- Anyone have knowledge of this at all? Its stuck on door edge and is a a white sticker stating-"Proportional valve-load sensitive. Checking at curb with tank filled 1/2 max. Lever of load sensitive valve pushed toward housing to touch stop. Spring to be without play or pre-tension." The car is an S reg Astra LS G mk.4 4 dr. hatch with X16szr engine. Theres no reference to it in handbook and cant find anything on here about it. I'm guessing it is a brake valve but not sure. Whatever it is, does it need any attention. The cars a good runner at present on 96K(fingers crossed) and has only a few minor problems i'm sorting out as i go. Would be grateful for any info thanks. Tom. Would a large PLEASE bring any response or suggestions?