I gotta say that looks really really good. I've been doing some tinkering, but mostly just thinkering, on a hobbo stove for awhile now, and yours looks way better than any ideas I've come up with so far. Very nice balance between the simplicity of a hobbo stove and some extra gasification action without overthinking or overdoing it and adding too much weight. I think your single wall burner / separate windscreen/potstand is definitely the way to go, and your dimensions and holes and gap between pot/screen all seem right on. I'm going to build some like this for sure, just play around with the dimensions some, just to know for sure. Maybe a bigger burner for winter. Easy change.