Measuring Salvinorin - Help!

[scyrusurcys]

Hello all - I've recently had a friend to make pure Salvinorin A powderedextract from a room temperature IPA method. The problem is, is that we have no efficient scale to weigh out such small amounts of extracts.We do not have the money to buy such a scale at this time. Are there any cheap* ways of measuring salvia extract to the nearest microgram? I've seen the scales (Diagem) that most people use to measure such amounts, but we really don't have the extra ~$150 to spend on one. If anyone has any advice or suggestions, please reply!
If anyone uses the pure salvinorin A powder, about how much do you use for a good, say, 5x-10x trip? Please refrence your dose to an object or size it!
(We are aware of the great intensity that pure Salvinorin A extract has in the powdered form and we are also aware that it may cost us some money to obtain an efficient scale. ALL SUGGESTIONS ARE WELCOME!) Thanks!