Last couple of evenings I've been cleaning, striping down and fitting new seals and a diaphragm to the EAS valve block (while listening to Smiff and Sniff pod casts on YouTube where ironically P38's and EAS faults got a mention) and something I found on a couple of the solenoid pistons bothered me. On the ones that are a two piece design with a spring around the outside they have 'rubber' plugs at each end, the lower one to seal against an orifice, while the upper one doesn't seem to have a job, and on some of these this upper plug wasn't secure, could this be a problem?