

That's great, send us a picture sometime (that is, if you are not going to patent your invention

).
Sure. One photo is of spacer bar. Not much to it. Cut from stock 1/4" aluminum bar, drilled for bolts, and original bolts replaced with slightly longer ones.
Other photo is of shoulder stabiliser, attached to mount plate added to top of the left handle. I've used one for a long time, and think it makes housed systems more manageable, making it easier to use the left hand to stabilize whilst shooting macro. This one uses a buoyancy tube, which I think makes the balance of the system better. With my other system, I just used a section of "U" channel aluminum stock, riveting ball points on the ends. The end piece is the same "U" channel aluminum, with a concave cut in the section against the body, and rubber tape to help keep it from slipping.
I've thought of putting velcro on the end piece, then more on my suit in the shoulder area, to see it that worked better, but haven't gotten around to it yet.
Oh, one of the photos shows the polycarbinate plate I mounted to the bottom of the housing. It's light, won't break, makes the camera a bit more stable when setting it down, and ought to keep it from getting scratched up on rough surfaces. If the stabiliser bar is swung down for extra support, you can pretty much set the system anywhere without fear of it toppling over.
Some of you may think all of this is nuts, but, heck, I'm having fun with it, and that's what counts.