Has anyone designed, or know of an existing "universal" stem mount that can handle 2 accessories? I'm thinking something along the lines of the Blendr mount, but without having to swap the stem out for a Blendr stem. The attached pics hopefully will make what I'm looking for clearer. If such mount does not exist, it's probably a good candidate for 3D printing. The idea is to be able to mount any device by using the proper adapter for it. If it's a Gopro, a Smart phone, a light, a computer, etc., you just use the proper mount for the device.

The 2 arms in the 1st picture attach to the stem screws. In the 2nd picture, the mount that is shown is specific to a computer, and would actually be substituted permanently for a mount similar to the one shown in the 3rd picture and would serve as the basis for the dual "universal" mount, to which you can attach up to 2 device specific bases. The 4th picture is just an example of the possibilities. FYI, the 3rd picture is actually part of the Blendr system, and is not intended to be integrated wholly in the design, just the 2 mounting holes. You can also ignore the color spacers in the 2nd picture, as they are not relevant to the idea.

I hope I made myself clear, and am not just rambling on!