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Two propane "weed burners" heating the gear. The burners were constantly kept in motion to prevent "spot heating". The intent was to get the entire gear hot, clear to the core, all over, not just in a few spots. A partially heated item will cool off really fast, and lock prematurely, possibly before positioning has been completed. Saturday we attempted to heat the first gear using only one torch, and were not able to pump enough BTU's into it. When the second torch was added, things progressed quite rapidly.
Photo by Bill Liebman.