So ill be doing a head gasket swap for a friend on a 2j and he wants to pay me with a map ecu 2 kit he was going to run. I don't know much about the piggyback I know it gets rid of the afm and you can tune fuel and small things like that. Should I take if or just get cash. I have a 7m with 560cc and ic kit with ddp and 3 inch exhaust running 10 psi on my gfb gforce boost controller and 14 on over boost. Would learning how to tune with this be worth it?