That's a huge thread, I'll have to pick at it when I have free time. I skipped through it and it looks impressive. The biggest issue that comes to mind is a rear hub and brake choice.I didn't even think about not being able to use a coaster brake.
By the way, to any southern Mainers I found an old girls bike in Berwick that looks like the roll fast in that thread.It's got a gas tank,fender headlight, fork struts and a book rack. I didn't stop to check it out closely but it's sitting out front of the house like it's for sale.It's a little rough but looks to be very salvageable.