Hey, now that is a nice adz! Looks like a Gransfor. The first time I used an adz was one of those. It belonged to a friend and I had to return it to him!
Yes, I've seen some adzes with the bevel on the inside, but most I've seen are on the outside. As it appeared easier to sharpen/hone/strop with the bevel on the outside, I thought to try it that way. As I might have mentioned already though...I'm a mere novice! A novice with much to much enthusiasm. LOL!
On the simple brick forge, I use the type of torch a plumber might use to "sweat pipes" (as they say here in the US). I find that propane works, but not as well as the fuel used for brazing. There's a brand here called "Mapp gas." I forget the actual name of the fuel, but it gets much hotter than propane.
Happy hollidays to all of you!
Tom