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Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,066
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
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I suspect you'll get a variety of methods/thoughts.
I now use two vets in every tube/blade while building. After the final cleaning I'll go back and plug the blades and seat stays completely and plug the chain stay small end vents (the BB ends are open into the shell). Each main frame tube has both ends open. I have played with closed bottle bosses with no real effect.
But I build for me and my wife only and don't live in a high water area. As my bikes get broken down every off season, and have been done so for decades, I have a real good idea to what MY needs are WRT moisture control. I do Frame Save before the initial build up and every few years later.
Too bad about your pricy BB bearings. I assume you know of Phil's service for rebuilding their products. Andy.