High Efficiency RO/DI Systems

[Myka]

I really need to do something about my 1:4 RO production (good:waste). Our water is metered and they use the water use to calculate septic use as well, so double ding!

Anyway, I've been scouring high efficiency RO systems and looking closely at description and pictures. I think the only difference between high efficiency and normal output is a booster pump and an auto flush kit. I believe the idea is simply to push the water through at a higher pressure and the auto flush keeps the membrane running at peak performance. I believe this can be done with typical membranes.

Does anyone know differently?