Reminds me of my youth , many years ago in the Rif mountains. Spent three weeks there with a farmer and a dutch guy who was an expert in extracting oil. WE HELPED HARVEST the crop, collect the resin and pollen and watched as the fella used various solvents, heating , washing , evaporating leaving us with x oz of the best oil evahh I cant remember how many lb's lbs of hash we started with (at £250 a lb) but what a trip. This was when you could be slung in pokey for a roach (in Jersey) so hash was expensive and hard to get so oil was perfect as volume to profit ratio was excellent -. Met some hardcore 'workers' out there with speed boats on the coast that would take 20m to do a trip to lessen the odds they would buy a tonne and get one delivered to anywhere in spain on the second.
spent an excellent 6 months over there a match head of the stuff in a j would knock 4 peoples sideways and i always remember you could buy a pint,pack of fags and a lighter for a quid - THATS how long ago it was lol