Hi ecka.
I think this is absolutely the correct route, at least this is what I saw in my head when I started reading this post, just don't have the ability to create the artwork, nice job by the way. If I'm correct the 5DIII and 7DII both have the joystick duplicated on the battery grip so the only major control that is not dealt with on this solution is the rear scroll wheel.
How difficult would it be for one of the third party manufacturers to run with this, they have access to all the control buttons and wheels needed. The only addition I can see that might be needed is an aluminium or maybe carbon composite reinforcement for the L shape due to the torque that would be transmitted especially on some of the larger standard zooms before you get to the range equipped with a bracket. I know that there would be costs but with today's rapid prototyping technology I'm sure this could be kept quite low.
Amazing to get from problem to solution in 5 pages!
Cheers, Graham.
PS @ dilbert, thank your lucky stars that you are not disabled and be less selfish in your attitude towards us, there are a lot of us out here!
ecka said:
This is it