sooo…is it only “counter-flow” if both the solvent and the cannabis are moving?
the batch style implementation of “counter-flow”, as seen in (say) Bucket Tek (Cold Ethanol Extraction on a Budget) or Data: potent & efficient lipid infusions via percolation (21 g batches) seems less “flowy” than packing a tube full of cannabis and pumping solvent round in circles as fast as you can for as long as it takes (eg pinnacle’s etoh skid, or my CRC if it get’s it’s way…)