Hello all. I am working on a Seth Thomas recorder movement. I removed the thick springs from it and want to use thinner less stronger main springs. Problem is the winding arbour is quite large for a regular spring to install on it. I have a tapered punch and i have expanded the hole a fair bit ut not enough to get it on.I habe propane torch and was thinking of heating it and expanding more with my tapered punch. Any thoughts on this ?
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