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Here are some tuning machines I made a few years ago along with the tooling: http://bbs.homeshopmachinist.net/threads/32324-Tuning-machine-gear-material Hope this helps.

Hate to be a downer but something doesn't look right with the gear teeth on the cam gear. It looks like either the dividing wasn't done correctly or the teeth aren't all cut to the same depth, or the blank was eccentric to the centerline of the dividing head when the teeth were being cut. Look...