Wow what a transformation. That is one sweet looking mama now...even with the taco'd front rim.
Bell makes a good one-size fits all road helmet that's pretty inexpensive, if you intend to keep on doing endos on the hard stuff. Sounds liek you got lucky. Most of my mtb endos end up with some kind of injury. As for the road, I try hard not to even go there.
PS. Nice sprint work by the radar cart, although, I did wonder, "is that guy wearing a helmet?"