There were several conflicting reviews, bit the only issue I noticed was that the overflow line for the coil cooling pot was undersized, and would regularly overflow the minute you took your eyes off of it no matter how much I adjusted the inflow. To help with this I added a valve on the inflow, and bored a wider hole on the outflow which helps, but even with the slightly larger bore hole it occasionally it will not want to drain and overflows. I would recommend boring at least a 3/4\"-1\" outside diameter hole for the overflow which will make the outflow hole between a1/2\"-3/4\" inside the fitting, and less likely to not want to drain. I'm still not sure why this happens with set inflow, but it does occasionally. Stills need to be monitored throughout so this shouldn't be an issue if you are being properly attentive.