The Vishnu flex has its advantages. But just getting around the trim issue is only part of the problem. As you get into higher ethanol content, your LPFP will become the week point. I know, I had that issue, but not anymore. The new Vishnu pump is the answer to this issue, and not just for the Proceed users. Terry's solution although innovative, didn't resolve the problem. I put down 422whp on a Mustang dyno and was able to pull through the half mile this weekend without any codes.
So don't jump to conclusions until FFTEC goes production with the new pump. That and what ever solution you go with to fix your trims will allow you to take full advantage of e85 and unlock the power you're looking to make. This is also true for upgraded turbo's.