Lucky the metal band was good.
Bob- You are fortunate that the metal bands are in good condition. On mine the brake linings were good and the bands had rust holes so it was time to make new bands. Would have been easy with a metal roll unit but didn’t have one so it was wood blocking and duck bill spreader from the 10 hydraulic porta-power. But it work well once I riveted the old linings on the new backing band.
The price you are quoting are fair, by the time all was said and done I probably had a days work in each band.
Back to your question about setting up the brake booster, the steps in the manual are pretty good. That little adjustment bushing in the manual is critical to getting the adjustment correct. But do the preliminary set up on the bench not on the truck that way you can check for leaks easy see pictures below. I like to put a ball valve in the vacuum line during testing with the vacuum gage on the booster side. That way you can pull the vacuum close the valve and see how quickly you loose vacuum. I use a 15 inch power vacuum pump and a stethoscope to listen for leaks.
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