Attaching a strap to a National Tricone and any electric guitar...pt.1

Over the years I´ve had some severe backproblems, and having to carry guitars with my shoulders have sometimes been impossible, and the whole standing up while playing and singing and all that jazz, have just not been an option...sooo...here is what I´ve come up with after a lot of trial and error
(with encouragement from Curtis Blues...give his stuff a listen at www.curtisblues.com)

I took a couple of leather guitarstraps and tied em around one grill. Took the thin end and tied it to another (the brown strap) with a nifty black and white tread I bought from a nice lady in Somerville, MA, on the other grill.
The brown broad strap now goes around my back and down and get attached on the bottom of the guitar at the end strap pin...or what ever it is called. The guitar will now be staying on my belly, held up by my backside, and will now not damage my shoulders or my back. It works surprisingly well. Cut some different holes in the strap for different heights, but that was about it. I use a Jim Dunlop straplock just for safety reasons.

The only remote danger is that the pull eventually will push the neck out of place and will make the guitar require a neck reset. But I figured:
1. It is a National Tricone. If this guitar cannot take some abuse, then what guitar will?
2. If it damages the guitar in the long run (It has yet to occur, been using this for a couple of months daily now) It will be easier to reset the neck on the guitar, than on me :)

Another cool thing is that the guitar looks like it is floating on your belly...