Yes, the edge burner has some appeal, but as it stands (in the photo) is a little delicate. But then, it was made of light Al shim, so no wonder. The big danger is that a gap - any gap, can be created by distortion and it could be over about 1.5 mm wide. When this happens the flame can get through and burn inside the head. Ahhh - no thanks!
But there are ways around that problem. I just haven't got to testing them yet. (Think hot-stamped Ti sheet.) Most of my time recently has been spent in getting a stove base for a liquid feed which does not need that preheat tube going up and down. I now think it is possible, but I need to do some more testing to eb sure.
The side wall burner using perforated metal is a neat idea - it avoids me having to drill lots of little holes! A problem with it is finding suitable perf metal. 1 mm thick SS with 2.5 mm holes is not quite what I was looking for. 0.25 mm thick SS (Ti?) with 1.5 mm holes and an open area of 40% would be nice - but it does not seem to exist.
However, the design does have a disadvantage in that the flames run up beside the wall, which can therefore get very hot. If the metal gets too hot the gas starts to decompose via a different path from normal, and the flame turns a translucent orange (glowing carbon atoms). Some commercial stoves do have this characteristic - eg Jetboil Helios at low power.
Indexing head ... I do have a small dividing head - an MYOG job generously given to me, but it is small, has a large overhang, and is not very stiff. I may have to buy a better one.
Crimping - I found that a hex crimp tool for coax connectors had a suitable insert, and I have been using that. A circular crimp tool is slightly better of course.
Contributions from other stove makers would be appreciated. Surely there are more than three of us in the world?