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I also spoke to machinist, and the waterjet is +-0.005 (which is why I increased servo cutout spacing to 0.01in total). Once approved I will order the sheet metal and screws.
Nathan and I also discussed and tested. We can confirm that all gearbox components utilize 6-32 Screws! Unfortunately, Servocity discontinued these products, so documentation is unreachable. This include the following:
Servo Gearbox
Spacer
Clamp
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