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Didn't provide much detail or information. Very basic intro to the topic, seemed mostly like an advertisement for Dapra stuff.
This movie did a fairly decent job of demonstrating setups and process of actually cutting the gears.
It is fairly lacking in the actual formulas to be used to calculate dimensions on the hobs for various sizes, and when formula's were ran through, several errors were caught (like the value of PI was given incorrectly several times).
Overall, I think watching this movie, combined with a book that has proper formulas on the subject, would be a good combo.
