haha ok... I have a custom Terpp mk4c, cause I have a friend who used to work for Terpp, who consulted me years ago and how to run my system...it sounds like you're new to this, I run between 20-50lb of material a day, EVERY DAY.... no its not rocket science here...its thermodynamics. are you running for crude oil when you run 25-30lbs of solvent? I would be shocked to see that much solvent returning piss yellow oil. what "solvent tank" tank are you running? any by the way, there are recovery tanks AND solvent tanks, just depends on the application (whats your IG, id like to see the people stating its not a recovery tank). and whoever you're talking to that says running 16lbs through a column isn't enough is dead wrong. if that were the case then why would I be getting back 10-17% returns on trim? and thats also what every big extractor I know runs...im @quail_extracts on ig if you wanna check my page.