I have heard that extracting using the FASA method isnt as effective as an STB tek. Your yeilds will be much lower.
i suspect that stb pulls a lot of junk you wouldn't get with other extraction methods. often you hear of people archieving much more than the literature reports with stb. a friend gets snow white crystals with acid/base without recrystallisation like i've never seen after an stb extraction. fasa and acid/base are more sophisticated methods for having less impurities. maybe with decent recrystallisation you'd get a comparable yields with all three methods?