Rob
Forum Moderator

I've flagged for the Optislang users as whilst I know roughly what it does, I have no idea what buttons there are to press. 

Thinking from a fluidics point of view (you may want to read up on vortex diodes, J.R. Tippetts is a good person to start with) you may want to run all of the forward and backwards scenarios and then see how the results overlay. There may be a configuration for best forward/reverse ratio but a different design maximises forward flow: goal weighting may become as critical as goal setting.Â