Well, if you know what mods u got, and what you would like to change, yes, the tuner should be able to give you some support in that regard. What is safe, what not, in a manner that is not a significant time investment on the tuner's part. That said, yes, some tuners are more "forthcoming" in that regard. Whether because they have it in their business model, whether it is just who they are, etc. Different people are comfy with different levels of support.