sorry this is probably way late, but i think you are right on the money, in testing them.
which subspecies are they(ie muscaria, alba, flavivolvata(?)...)
i saw some in a store in sandiego, and asked my bro on another site, after telling him my weight(175) and ethnobotanical / psychedelic history( a LOT). he said to start with about 2-3g, and work up. ive heard 7g from a 185lb dude, but that seems like a lot. i suggest google the shit(amt of muscimol/ibotenic acid per gram of soma...then threshold dose per kilogram of body weight, a little math, and youll end up with a figure. if thats my bro, he would take that figure and add to it,no matter the substance. some are conservative. some are standard. you decide.
fuck, im rambling like hell...hope thats allowed on this site...lol