...not that there was anything all that wrong with Version 1... I suppose it did wobble a bit when on the tripod, since the quick release was just mounted to the bottom of a pistol grip, and it was a bit heavy.
So, Mk. II:
Shoulder part is separate rather than built in: Made out of PVC pipe (heat flattened and bent) covered in scrap upholstery leather, with webbing to allow for different attachment points for the shoulder brace. Also a velcro strap in the back, since I'm often tethered to a monitor, and that will keep the cables out of my way. There's also some adjustment in length.
Pistol grip changed, and is removable, so when it's on a tripod or when you use the front grips and want it lighter, you can take it off.
Figg rigg type circle evolved into side handles that can be locked down (nice for when using it shoulder mounted) or up (allows a top handle, and other options). There's also places to mount the remote, so I can zoom without taking a hand off the handle.
Front center grip is a folding tactical grip made for firearms... it's attached to a weaver rail, so I could remove it easily and add something like a flashlight or laser if I felt so inclined. Laugh if you will, but since I use this in workshops teaching how to line things up for the camera, I've actually seriously considered the laser site option.
Camera is on a quick release with levels, whole rig is also on a quick release, and I have two base plates for that so I can switch between my full tripod and a mini-grounder for those low angle shots.
Have a part coming in the mail that might let me add a focus wheel to this.
So... now I just have to learn better how to shoot with the damn thing!