I'm not familiar with that RO, but in general any RO gives greater permeate flow and lower volumn but higher sugar % for concentrate. With that in mind, it all depends on the pump and the pressure the components are designed to handle.
Testing with distilled water is never going to give you an idea of how the RO will work with sap, with distilled water, while you can find leaks, the RO has nothing to seperate, like sap does.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.