I use my heatgun in my garage on my workbench. No way I'm doing that in the house. I also make sure to unplug after every use. You could start a fire pretty easy leaving one unattended.
In reply to eday. I had the issue once or twice with the edge of the page curled a bit. But I manually scan all. Ynpages so not too big a deal for me. But it is a thing that can happen.
I kind of like the spine on when I debind because the glue will stay in one place on the spine. One time I took it off and the glue tended to want to stay on the pages.
I find once th glue is hot you just need periodic application of heat. A couple short passes per page and remove, repeat. You only need to lay the heat on in the beggining.
A far as the focused heat with an air guide, I'm somewhat worried about concentrating the heat in one spot, imoreffer the more diverse flow to heat the general are without haveing to worry about it concentrating on one spot and burning a page.
As far as the cover, I just bend it back till it stays open. It will lose its memory pretty quickly and not keep trying to close on you. Also generally once things are hot I don't need to use any force to have the page come out, even at the end. If I'm at the end and I pull and the whole mag comes with it I just keep using heat in a sweeping motion until it comes off with no force. I also try to keep the end of the heat gun at least 6 inches away if not closer to 9 from the pages.