R33fourdoor,
Hey mate, I got your PM, will reply to it when I have a bit more time. I know the reasons you use Vortex (work Caltex fuel card) but have you considered getting Shaun to do a map for Vortex 95RON and another map for 98RON? If you have a Microtech handset (~$160-$200AUD new) then you can actually store 4 completely different maps in it. You can then switch between maps in a matter of 10-20sec.
As for the misfire issue, hmmm it's got me puzzled. I run 20+psi, same ECU, stock coils, plugs gapped to 0.8mm and I rarely have misfires unless it's really cold and the plugs are a touch fouled up. Once the plug temp comes up it doesn't misfire at all. What heat range plugs did Shaun use?