With the miserably hot weather (yes, hottest summer on record) not much got done on the Wiscasset house. The side door did have a problem with rot, and the bottom quarter of the door was long past the expoxy patching remedies. I suspect that one issue was that the door is unprotected, and also opened out, leaving it flush with the side of the house (this configuration was chosen since at the beginning of the renovation project, it was the only useful entry, and opening out made it easier for construction materials to enter the building).
Since this was the second replacement, I had the good fortune of a standard size, plumb rough opening.
I elected to go with a fiberglass shell door, hoping I will avoid some of the rotting isssues that plagued me in the past. While a competent professional would probably have installed this in an hour, we did get it in ourselves in an afternoon, now just finishing the painting and re-doing the interior trim. All set for winter.