We here at Ofna Racing also use Byron's 30% Gen.2 fuel and works great we've been using since the 10th scale On-Road Nationls in Tx. back in Nov. retuning the engine was not a problem and makes more fuel milage, I have to recalculate when I run in buggy. So far I have managed to run almost 9min. on a tank of fuel in my Jammin X1 and a Jammin JPX.21 engine with the tune still at slightly rich setting, a great product for Picco, Hyper and Force line of engines.
Dj
Ofna Racing