That's true all you have to do is scale the IFR by 30%. As long as the 93 octane tune is pretty good/decent nothing further needs to be done. For hptuners you actually subtract 30%, and dhp you add 30%. I'm still not sure why everyone thinks there's more involved than that. HOWEVER, you have 105 octane now, so leaving the timing, AFR, and boost the same would be stupid so you'll be messing with other tables you don't "need" to.