It is nice to hear I'm not alone. Today was disappointing, but not "why don't I give up" disappointing like the last week has been. Still haven't even gotten. 1/2 of one of my frequent good days last year.

@crzypete your in the ballpark of my system which I built custom. It's four 100gpd membrane in series (more efficient membrane flushing so you get more per membrane than just using a single). It's somewhere in the ballpark of an RO10 if I recall, but I can do a throughput test tonight if you want since I'm using it.. I do two passes and take out 75% of the water with a target of 6% sugar. I can easily go through 10 gallons this way in a few hours. Or more like 25gal in the same time if I just do a single pass to 50% water removal.

It's definitely cheeper to build your own, but it will still cost $110 for 4 membranes/housings, $110 for the pump, and conservatively $100 for the valve, filter housing, fittings, pressure gauge, etc. it's also reasonably scalable to a bigger system using 400gpd membranes, but you may need/want a bigger pump.

Let me know if your interested and I can get you the design and bill of materials. It's life changing :-).