Aaa, ok. Yes, I didn't upload the full history. It's really, really messy. If you tried to edit any of the features, it would just explode. One of those models where you didn't know what your making until you made it, and kept adding on changes, and it just gets ungainly.
I've included the parts as "dumb" files so if you need to change anything you can just build off of the provided parts using "move face" tools and such, or just extruding new bosses, cutting bigger holes, etc. Basically just add features onto the end. Definitely don't do feature recognition unless you want to freeze your computer. But you can't just right click and edit a feature unfortunately.