Remember that the efi pressure regulator is set for 2.5 bar only where as the cossy used 3.0 bar. Unless you up the fuel rail pressure to.0 3 bar you won't get very far.

About the adaptor plates, fyi, nobody uses them over here as it's much simpler to just grind ~4mm of the head. Some people didn't understand to grind anything away and are still getting good power and no issues.