SMALLRIG Nikon D750 Cage 1714 is specially designed for Nikon D750. A shoe mount on top plate allows you to attach any shoe mount compatible accessories, such as LED lights, microphones and other device. It also provides arrays of 1/4'' and 3/8'' mounting holes for accessories attachment. And the two threaded holes in most front perfectly fit for vertical robs' attachment. The anti-twist design, HDMI clamp and rubber cushion help to keep camera secure and balance. It is useful and stable.
1 x cage
1 x HDMI Clamp 1521
2 x 1/4''-20 screw
2 x M4 screw
2 x hex spanner
Material: aluminium alloy
Dave. It can be nice to have the hotshoe mount used to add extra rigidity, but then you obviously lose access to use of that mount. There appears to be an addition of anti twist brackets in the front that should be sufficient in preventing the camera from shifting when it is mounted to this cage instead of having a mounting point to the hotshoe. This camera is a great videography and photography camera and it would be great to have a cage that allows you to do both.
Is there any way that the final design could have a longer top plate that would tie into the hotshoe for more rigidity? That really seems like a necessary point of contact for maximum strength.