A cold water extraction is how the shamans have been using these plants for millenia. So I recommend that. It removes most of the toxins and much of the vasoconstrictive properties (though LSA itself is strongly vasoconstrictive so you might still get sensitive extremities). One of the toxins in MG seeds (or was it HBWR only? I forget!) is related to cyanide, so best to get it out to be safe.
This post has a few methods. Entropymancer lists a quick and easy and effective method (though some people say to make sure to keep it out of light and to use distilled water, as LSA is destroyed by light / UV). Ron chimes in and adds some background why it works type stuff. There is also a link to a tek on the nexus wiki using solvents for a crude extraction.
You may also want to check out the
LSA to LSH conversion, which makes the LSA much more like LSD at least in low to moderate doses. I personally haven't gotten it to work effectively but honestly I gave up trying LSA a while back so I haven't had many opportunities to try (only tried 2-3 times). Hope it works out for someone else though. Good luck. Beautiful pictures, by the way.