I have no idea what guitars FAS uses, but it really does not matter to me. My favorite guitars at the moment are a Suhr Modern (for the humbucker thing) and a Suhr Classic loaded with ML pickups. I loaded a bank of presets I constructed into bank 1 for the Modern, and also loaded a bank of presets into bank 2 for the Classic. Some of the presets are built from scratch and some are factory presets that I used for a starting platform and then tweaked, re-tweaked, re-re-tweaked... you know what I mean. I use a lot of the same amps for both guitars, but tweaked the presets for each.
In fact, I no longer practice, now I fractice. Playing and tweaking the Fractal simultaneously. I don't plactal though, because it sounds too painful. I do occasionally pleak.