00   (intro)
  01   02   03   04   (my prep work)
  05   06   07   (HVAC install and related)
  08   09   (main retrofit days 1 - 2, substantial demolition)
  10a   10b   11   12   13   (main retrofit days 3 - 11, construction)
  14   15   16   17   (main retrofit days 12 - 22, construction)
  18   19   20   (roofing)
  21   22   23   (post-contractor fixups, job wrapup, and some early performance data)
  24   25   26   27   (deeper testing/observation scenarios, stats, and more small improvements)

Additional projects:
Other ongoing home-improvement activities, either related to the retrofit or not
    Roof ridge cap splices
    Clips to hold down gutter guards instead of zip-screws
    Motion-sensor light and doorbell hack
    Deep drainage/infiltration pit in the front yard
    Permeable pavers driveway rework (fairly major project)
    Underground gutter, below-grade foundation water protection
    Front door fix-ups, less ugliness and more thermal performance
    Snow clearing on the roof and related insights, "endless winter" 2015
    External foundation insulation, a layer of R-8 rockwool wrapped around most of the basement wall
    Diagnosing a heat-pump failure due to a bum thermistor, summer 2018
    Chasing an annoying slow refrigerant leak in the Daikin   (multi-year saga, 2019 - ?)
    Replacing the main inverter board in the Daikin outdoor unit, and figuring out why it died (spring 2021)
    Finally documenting the basement radiant barrier installation, which I didn't capture a ton of detail about