Once upon a time, I started an IVA-only playthrough, which was strongly disrupted by the lack of interactive IVAs for the stock parts, and the lack of MAS IVAs in general. Having found none suitable, I recalled a certain maxim: "Be the change you wish to see in the world."  Thusly, I set out to make my own. These may not be the prettiest or most well-planned cockpits imaginable, but they exist now, and that's good enough for me.   Obligatory screenshots:   Download from Git