-----Original Message-----From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org]On Behalf Of Smyth, AlecSent: Thursday, February 15, 2007 10:14 AMTo: personal_submersibles@psubs.orgSubject: RE: [PSUBS-MAILIST] through-hulls Frank, I didn't follow the release mechanism explanation but it sounds very intriguing. D'you have a diagram you could upload? thanks, Alec