I can't blame you for doing that with your car and your luck
But honestly, either I have the worlds safest E85 tune (I am only 20rwkw gain in the top end and 40rwkw in the mid), or a healthy ass engine setup. When I switch back to E85 it's usually 50+ litres that goes in and whilst I don't redline the thing on that tank, it definitely gets boosted to full boost no problems. This is why I'd never flex fuel my current car. It would take some seriously diminished E85 locations or massive pride rises in it for me to flex.
You're never going to have an issue with fuel while running a safe, static E85 tune, because all it will do is run richer by way of the extra fuelling and richer mix.