Maybe this information is just becoming available through testing we have seen in the recent weeks. But I cant see why most of you didn't opt for the larger injectors for $150 (or so) more. You would have all the fuel you would need on stock numbers for the easiest way possible. This eliminates the need for a RFS which costs 3X more with the same simplicity as what you had already done.
If I were looking to get another 2psi out of my edged out pump gas setup, I would just sell those 750's on the market, buy 1000's, and you will have all you need. I am shooting for 11psi in the near future and from the data Iv'e collected I wouldn't need to upgrade a thing. All while consuming 30% more fuel.
I most likely will get a RFS and go for more power but I wont leave E85. The smell alone is worth it.