the less vodka the higher the potentcy but then its not an eact art. when i did it i used a litre and about a years worth of stems. so i dont know what that was in weight.

what ever you can get. chuck it all it. blending would be a sweet idea. that way it will absorb quicker.

leave it to frement for aslong as you can.

when i did mine i literally kept it for 14 months just adding stems when i had them.

so i would say a month or two at least

peace