Hey mate,

I dont have much experience with the Ielasi tuned stuff myself, but a lot on OS based engines, hasi etc.
Prior to the world champs i switched to max power quadrifoglios, and I have absolutely nothing bad to say, power is insane, run in like a treat and most importantly reliable!

Personally I cant see myself going back to anything else, You wont be dissapointed with the Max.
I've got both RP9 and 351s and personally prefer the 351s