Evaporation without heat source is just simple, slow evaporation. At the most, using a little fan to speed up the process if you want.

I haven't tried any LSA extraction, but there is at least one way for consuming HBWR seeds that worked great and clean for me. The culprits for sickness and a good deal of the body load that HBWR seeds produce can be several compounds, mostly ergotoxins and cyanogenic glycosides found in the plant material. So doing a cold water extraction that picks up ONLY the desired goodies is also a good option.

I prepare a strong peppermint tea, acidify it with lemon juice to pH 4, let it cool off in the fridge, add the ground seeds, shake occasionally and keep cool for ten minutes or so, decant the liquid (discarding the seed solids) and drink it right away. With some ginger or honey if you want. It works for me, barely any nausea after that.

And there's never enough crazy teks - as long as they work, we'll be happily welcoming them!