Yeah that plunge door looks interesting. I need to get myself a little stick welder I think so I can build something.
I agree the glass view port isn't necessary. I'm fine eliminating it. My goals for this are baking bread (450F ish) and canning/simmering fruit. I bake bread weekly but only can in batches when fruit is available. I haven't really figured out how to modify the rocket stove design to handle canning + baking. It seems like the walker style stove is more geared towards that. The walker stove seems pretty inexpensive if I can salvage a door and the cooktops. Roughly in the $600ish range. I think a rocket stove could be cheaper if I could figure out how to change the design to canning + baking