I wouldn't know. Though I consider differently. I'd not thought it necessary to pull the cams to remove the chain. Really, I have 0 insight. Regardless: The top was off during the surgical procedure. The hour I paid for was fair; even if I could have done 12 values in 10 minutes. I mean, it was already laid wide-open
And ascertaining any need for a shim was 10 minutes worth. Now, had it been necessary to add shims then more time would have been necessary. But! If checking valves at this stage only require 10 minutes then why charge for an hour. I'm most happy to have the beast home again, and after all it's only money.
Paying for time spent when no time is expended, is like paying for a yard mowing during a drought.