On the testing, its working awesome. the herbie is working great. really sensitive on the gate valve when you get close to equalibrium. But the overflow pulls a 1/4" skim off the top of the tank. All the way across. Thats with about 1100GPH flow
Just draining the tap water now, 4 days from now, should have the tank full of RO/DI Damn 50gpd units HAHAHA