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Join Date: Feb 2012
Location: Rochester, NY
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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 would search this forum and Velocipede Salon for Doug Fattic's posts about OP. he's done a lot of homework and shared a lot.
My commit about a newbie using a smaller tip is that they don't have the skills to control things as they happen and often react after things get too hot. A smaller flame slows down this and allows their reactions to better keep pace. But the longer the time at heat the more the flux "wears out" and the metal goes through it's changes. This is why good instruction and practice are so important before a real frame is tried. Andy
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AndrewRStewart