> The distance between the pot and the Snow Peak bowl is nominally 3/16" to 1/4".
Well, that does give a fair cross-sectional area, but ... This is something I found when testing the Caldera: all stoves need a large exhaust area to function well. The cold inlet gases may only need a small area, but the hot exhaust gases need a much bigger one.
Cost - yeah, a problem. I have some light and very cheap conventional aluminium windscreens ...