Building your own is not the problem, design and sizes are the problem. If you go to Tri-Clover next year, use at least 1" if not 1.5". Mine is 1.5" and has never plugged, even when I've reversed in the syrup pan, so the incoming travels thru 2 90's and over 3' of pipe.
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.