I rotated the canister the other way to make the pickup tube pointing down, and if I turn off the canister valve the stove will still go for a while so I know it's in liquid mode.

As far as I can tell in stores, the litech is basically an eta pot without heat exchanger, so if I had one it would be as close it'll get short of kill another eta pot.

The exchanger itself on bigger eta pot is larger than the 1L pot, so I imagine it would pick up more heat. I do have another bigger eta pot, maybe I can test it against the small one some day.