Luke,
Congrats on the basic keel certification. Even if you've been sailing a lot, you usually end up learning more, and have a holiday/vacation at the same time.
My wife was taking her mandatory training course before getting her motorcycle license. I've been riding bikes since I was in elementary school, but figured that I may learn something new so I took the course with her.
I didn't learn anywhere near as much additional stuff, as i did when I took my first official sailing course, but it was still worth it.
What's your plan for the door sweep under the hatch ? I doubt the double sided tape they commonly have on door weather stripping would last long, so I'm thinking that adhesive used for automotive weather stripping would be the best.
Are you planning on curtains for the ports again ?