Dash Mounting Ideas

So I did this when I took may dash out and left the windshield in. The two middle bolts are the toughest . It honestly wasn't that bad overall though, but I'm also younger in years and I don't have any other seats in car. If you were an older gentleman and a little less nimble with seats and other stuff in the way I could see how it may be a bit more difficult.
Yeah, I don't "mind" doing some crazy yoga moves to work under the dash, but I would be more willing, and probably do a cleaner job if it were hinged.