I was relaxing with a beer and an old MR magazine after working several hours on remodeling my basement so I can put in a new train layout (what better way is there to relax)
I don’t recall the exact issue but I believe it was in the back of a 1990 MR. In it was a picture of a Frisco steam engine—live steam, that is; designed by a guy in Europe–perhaps Switzerland. It ran well and the small article stated that live steam also had been designed in HO, O, and N. I believe all ran on Butane.
I don’t know about you but sounds like fascinating stuff to me.