Give me checklist for fall boiler cleaning and inspection

I'm seeking a thorough checklist that a competent steam pro would tend to use in doing a routine fall boiler inspection and cleaning. I bought this house a little over a year ago and had the contractor who had done the service in the past come out to inspect the boiler, but as I stood there and watched, I did not see the technician doing much more than peering around with a flashlight. I assumed I should have had a cleaning of the gas burners and possibly of the underside of the boiler sections where the flame meets them, a combustion analysis, and probably other checking and testing. I intend to hire a good steam pro (two from this site live close enough that they would probably come to my location), and although I would trust a vetted steam pro, I would like to be armed with a good checklist showing the things that should be inspected and reviewed and preventively maintained in an annual maintenance procedure.

Boiler is about 10 years old and is a Peerless 63-06-sprk-w/s. This is a one-pipe steam system. I've already added massive multiple Big Mouth venting on the mains, washed out the wet returns, checked all mains for proper pitch, replaced missing insulation, and replaced all radiator vents with appropriate replacements, and also lowered the formerly too-high pressuretrol settings to recommended settings and recalibrated the set-screw to measure the pressuretrol's accuracy by watching the low pressure gauge that I added on a pigtail.

I've done what I can do, and now would like a checklist so I can make sure that whatever pro I hire performs a thorough annual checkup/cleaning/maintenance. I'm willing to pay what's fair for thorough work, and I don't want to skip any preventive maintenance just to save money short term.

Please share check-list and inspection list suggestions. Thanks, all.