ok now. if you know that you have 1 g for sure then you can do a liquid measurement.
go to a pharmacy and buy some 1 cc insulin syringes. usually $5.00 for 10 pack of needles. now buy some everclear (or distilled water). everclear works best. dilutle the 2cb into i would say 50-100 mL of everclear. lets say 50 mL. one full syringe is 1 mL. so get dilute the 2cb with everclear with 50mL. now you have 50mL (everclear) = 1000mg of 2cb. so every full needle 1mL is equal to 20 mg of 2cb. This should be more than enough to get you going.
2cb dosage is 12-25 mg.
needles can measure out 1/100 of a mL so you can be very presise in your measuremnets.
the only thing that might be a little off is not knowing your starting weight. maybe you have 1.2g and not 1 g of 2cb. this would throw the measurements a little off but not dangerously.
good luck man.
post a reply if you are confused about anything i said.
peace