So I grabbed a new booster pump
http://www.bulkreefsupply.com/1-4-aq...ump-kit-1.html
and ermagerd.
I was using a Vertex pump before which did about 40 psi with no ability to adjust. I'm now running 90 psi to my RO Membrane, and just wow. I made 10 gallons of water in a couple hours, if that.
If you are making your own RO water, and have less than 60 psi pressure to the unit, I'd definitely suggest getting one of these. I could not be happier.