I really like how the above picture shows that I am incapable of cutting a circular hole....but at least the foam core edges have been filled with bog! :)
Taping the above area sucked for me, just like it has sucked for everyone else. Here's how it looked after taping...on second thought, I don't want to show this picture. You show me yours, and I'll show you mine....
Thankfully I did the tough part first, then moved to the inside:
Before I quit for the night, I laminated a couple layers of A onto the cutout from the bow bulkhead hole (to form a flanged hatch), and also put a single layer of A on the large fwd bunktop hatch cutout.