I've gone out and resurrected my old 450GPD unit. Had to replace a pipe as is has been tucked away for over 2 years now and has perished. Another slow drip from a John Guest fitting.
Water pressure 55psi - no booster
I've filled two 4 pint 2.27 litre plastic milk containers at the same time, one with pure and the other with waste.
10.46am test began.
10.48 and 50 seconds - waste container full.
10.51 pure container full.
1 new sediment filter, 1 CAG filter, 3 x 150GPD very old membranes and then a 10" resin container.
Pure produced - 0.45lpm
Time to fill 1000 liter IBC tank = 37 hours.
I would imagine your figures should be 2/3rds of those.
But compared to my 4040, this is painfully slow.