That's what I always thought too, but doesn't red locktite not allow removal with just mechanical force? It seems people are able to take off the powertube with just a bench vice and a pair of channel locks, no heat. Strange.
Anyway, hill did post a few videos of his good results with this insert. It looks promising for people who don't have access to an air source all the time. I've got access to a 5000 psi compressor so all my tanks are filled all the time anyway, making this insert not as useful for me.
The classic insert I did get to use on a pump mag, with 12ies. We'll see how that goes when the time comes, but the initial reports are encouraging.