SCT X3 tuner updates

[Brickell FIST]

I have a spare SCT X3 programmer and rather not see if going to waste. I have seen people post about this but nothing as of late. I called SCT, they said it isn't supported. However, some members say they have it and use it. I have a good SCT tuner and dyno close by. He tuned my Shelby, but had zero experience with the FiST. Just wanted to ask the forum if using the x3 is feasible. Yes, the AP is much better but this free.