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Looking at my new (to me) DIN regs, it seems that the simple push on cap wont seal worth a crap during a soak since the o-ring is at the end of the DIN bolt which isn't compressed. There's leak paths between the wheel and bolt as well as along the threads. Other than soaking my regs pressurized, is there a solid cap that actually seals against the oring like I'd think you would want. the regular DIN cap seems more of just something to prevent splash intrusion - water resistant as opposed to water proof which is what you'd get with an actual seal. Am I missing something?