i have similar questions, just for peace of mind want to confirm... I have a 2000 camaro ls1, working towards the 2-3 bar COS< which wouldbe from a 2002 ls1... I found a stock tune on holden crazy for a 2002 ls1 OS#12212156. The way i understand it, i can flash the 02 stock tune(holdencrazy), then the custom OS tune(efi), then load the calibrations from the holdencrazy tune, then i would be ready for tuning in the new COS.. is this correct?