Basically, you can study the acf file all you like, but the vast majority of this aircraft, in particular the engines, is run by Gizmo with acf figures providing a starting point. The entire engine system has been coded from scratch. We had to manipulate a lot of figures to provide this starting point, but, even if you're going in there just to see what we did, please do it knowing that the engines, as well as most of the other systems, are being driven by code. This is actually one of the reasons I wish we could encrypt our files. Not for "security", but because we know some people will start asking why we did some things we did.