And I'll add, from personal experience from my first cored bead, dap gently on each side of the bead, moving back and forth from one side to the other. Don't try to flare one side all at once. It will buckle the non-flared side before you can get it even a little flared. And do this on a steel bench block or hardened steel sheet.
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ESC
Soft glass on a Minor/concentrator since 1996
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