Wow, John, yet another very excellent, informative and well documented post.
Thank you for taking the time to do this. Your info speaks volumes of the question putty tape vs butyl.
I have also found for myself a lot of what you posted in pics here, especially in my old Citation rebuild. The factory design was very poor at best, and couple that with putty tape and it was a disaster the day it rolled off the assembly line.
I remember how easy the cheap putty tape came off in fragmented chunks. A putty knife running along the seal line sent it in fragments to the floor below. But it was far too late, the old Citation was rotten top to bottom, end to end. Why I fixed it remains a mystery to me to this day. Shoulda towed it to the dump.
On the other side of this, I once had the misfortune of taking out an entry door I had sealed in place with butyl. What a chore, what a mess, and as you say, the bond held fast to both surfaces while I had to break the butyl itself apart. I had a miserable time getting the door out, but not one drop of water made it past my sealing job.
There are those among us who want the easiest way out on any given task. Yeah that's nice, but I'd rather go the extra mile and do the job properly with the right materials. It pays off in the end.
Nice work John, you are a man after my own heart! :) Great looking shop you have there too, I rebuilt the Citation under a tarp in my driveway at the rainy west coast of Canada.