Twin turbo gto

Whats up everyone, im new to the forum and im finished building my twin turbo GTO now comes the tuning. Currently im using tunerpro. I found ls1boost and thats super helpful to extend the ve tables and all the additional features are gonna be helpful later on. Currently i have a patched vett os and slowly going between my gto os and the vett os and changing over, one slow step at a time. Now ive come to fuel amd im not seeing a easy way to scale injectors... am i just missing something?

Also how do you fail the maf to be in a true SD tune?

Any help is greatly appreciated