You are right about that. I especially like the method of sealing the leading edge of the signboard but slicing a section out and using a sticker and the way an Estes motor can be screwed in. I have used hot glue a few times recently myself and it is definitely in my list of rocketry glues.
I could have sworn this video had been posted before, but was happy to see it again!
I watch his videos a lot, and he posted an interesting one not too long ago - he took apart a video game controller and turned it into a launch controller for rockets! Pretty cool project!
Why? For what it will cost to treat a roll of toilet paper, you can get a huge bale of treated insulation at any home improvement store that will last your entire club into the next century. It's shredded newspaper treated in borax. Per flight cost... Under a penny.