Thanks for information and effort, HOTFR8!
The pumphouse roof is FINISHED! Again, I'll never be hired as a cabinet maker, but I think the pumphouse will remain reasonably dry. I had about 2" of shingle above the peak on the front side that I cut off, then I added one more row of shingles. I put the last few rows on the rear from the FRONT using the cushion I had seen the roofing crew use for "sure footing" over the peak as I leaned across. I still may have a couple of bruises in the morning, but more of that later.
I folded over the front row under the last row from the rear, folded over the last rear row, and THEN added the ridge shingles. All the Internet info I found was working with standard three-tab shingles. Well, of course, the wife would have nothing of that -- we have to have architectural shingles. The problem with that is that in places the shingles are two and three layers thick. That's what I could not cut with a hook knife. I measured my shingles at just about 39", divided that by 3, and got 13". So, I cut left-over pieces and two full shingles into 20+ ridge pieces about 13" wide. Then I did the angle cut on the "non-architectural" part of ridge pieces that all the Internet resources suggested (to keep corners from poking out). I could do that with a hook knife since it was only one layer. I felt like a real roofer at times!
As I was installing the ridge pieces the occasional drizzle became a steady but light drizzle. I was determined to finish up the job (don't tell my wife; I believe I mentioned she was on her Christmas trip) and since I was straddling the peak, I didn't feel too unsafe. On the other hand, the roughly 90 degree angle at the peak created two problems. First, the ridge pieces didn't want to fold over easily and some cracked a little. That shouldn't be a problem since there are two more layers of shingles underneath. Of course, one of the reasons I folded over the last front AND rear rows was to give a more rounded peak; to no avail. Second, sitting on that peak was a bit uncomfortable. We will see whether I have more soreness from leaning across the peak to finish the rear rows or sitting on the peak for the ridge shingles.
You'd think this finishes up the pumphouse -- it's been going on long enough -- but I might try some of that Great Stuff foam insulation on the cracks from the pieced together insulation and I want to extend the hose through the wall to an outside bib. Oh, and maybe I should have a door latch that I can use when I want the door closed but not locked. Always something.
I was pleased to put one of my "10 Favorite Cars" in the workshop. It's a 1991 British Racing Green Special Edition Mazda Miata. Not a show car, but one that's fun to drive. The design process for this thing to mimic 50's and 60's British sports cars is amazing.
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Oh wow did you just make me laugh