I ran on the same MAHA dyno earlier this year (May) but using an earlier version of the OFT E85 tune. (v1.42)
In terms of power mods on my car, it is a fairly short and simple list:
Berk Catless Front Pipe
AFe Drop-in dry air filter in the stock airbox
Perrin air inlet tube
Vishnu Tuning OpenFlash Tablet, running the OTS Stage 2 EL E85 Tune v1.42
Running stock headers and muffler system
Propel E85 fuel
As you can see I did not run into any of the issues that ck-GT86 encountered. I've since switched over to v2.0x of the tune, and although I haven't dyno'd the car since, like probably most of you running the OFT v2.0x tunes I haven't felt anything out of the ordinary in driving the car. (I've also since switched back to 91 tune just for fuel convenience reasons).