Hey OW, first time I used the UFS it was perfect. I wondered what all the hoopla was about. Then the next tank and a few thereafter- flooded, etc. Don't know what I did the first time, was a fluke. Then again I didn't totally fill it up either. Anyway, big learning curve, now I have it down. It is worth the effort. If you don't want it- one of us will take it. - If I may add, if UFS doesn't taste good or work right it is always user error.
I find the DC cartos work best in it at 6V - thanks to Bruce for suggesting this to me.