Yeah there's quite a lot of topics on other forums about them leaking, and the diaphragms being really flimsy! I do love my chatter! I've had the BOV port blocked off from day 1, but I bought the Type S last year off Ebay for cheap as it's the only one I've ever liked and thought I'd try it out. Turns out it didn't have that characteristic PING sound and was a bit wheezy. Couldn't fix it either as other people has seemed to have done! I ask if anyone else has one because I'm looking into getting a diaphragm from a US company which is from a BOV based exactly on a Type S but has a better designed, stronger diaphragm. They definitely fit in original type S going by what some US forums have said, it costs $40 but the shipping is $40! So was wondering if anyone was needing another so we could split postage?