hahaha yeah massive tank in your beast
No boost for first few minutes of driving shouldn't be a worry at all, but after a few corners and a couple of hundred meters, the lines should be flushed and fuel in tank mixed....will be sweet. mini laptop in the glovebox with USB cable down to ECU will be a ripper, and I'll only ever bother running ethanol blends.
Only question remaining though, are we sure they'll only swap it twice a year? ie. as we come into winter, they change it to e70, then as we move back into summer, they change back to e85?