Whats the smallest rxtal youbees have heard of? (with reasonable return...) SWIM read a post somewhere that mentioned something like anything below ~5g would be a waste due to mechanical loss etc..., but cannot find the post  

Even the smallest amount can bee reXed if you use the dH2O evaporating at room temp technique

Worlocks newbee reX get's sketchy once you dip below a half gram or so. Even below one gram is pushing it. See

Post 483474

(ChemoSabe: "Shard Garden", Stimulants)

Don't know about other forms of dual solvent reX's