Just had a play with the latest Hp Tuners scanner and editor. Wow. We can now datalog spark advance and retard (knock retard) in graph form. I.e Rpm vs Kpa. This allows you to pin point exactly where to adjust timing. Heaps of new stuff in the Editor I noticed. High boost not a problem with map sensor calibration, more boost control tables, looks like they have sorted turning off traction control permanently. You are not doing yourself any favours using SCT. Find a tuner who uses HP Tuner and is happy to leave the tune unlocked so it leaves your tuning options open. Locking tunes is no longer the way to go, it is selfish, costly to the customer and hides poor tuning. If you are a good tuner you will let others see your work, not hide it. Just buy it, you wont regret just being able to change small things in the tune and being able to pull fault codes.