Thanks guys, The pics are helpful. A few are almost exactly what I've got. I agree that it's probably overkill. That said, the top is very flat.
The guitar sounds pretty good but not as good as a late model Boseman i had a number of years ago and nowhere near as good as my 2006 Martin D-28 Standard. Also, the added wood doesn't make it much heavier than the Martin.
Looking closer, I can see a gap between the brace and the top, each brace resting on the X braces. The bolts are directly pressed against the top so that if one were to loosen them a bit, whatever change it makes to the bowing of the top would be eliminated. I'm going to try loosening them a bit to see what happens. I'll post results if I get around to doing it anytime soon.
So, the double X bracing is unusual, eh? I take it from the comments, not a good thing. Still, I got a pretty good deal on the HB and I've been happy with it. Arthritis is making it harder to play narrow necks so am in the market for a nice guitar with a 1 3/4" nut width or greater.
Thanks again for the comments. Really helpful!!