This arm can be clipped on a MK4 and be used in combination with the articulating camera mount parts as well as my POE camera adapter. It fits in a Tukkari TF enclosure.

Designed to be useable in combination with my lights holder.

To be sure to be able to use the complete build height of the MK4 you should print and install the optional support (see red box in above image). Otherwise the movable Z-axis parts may collide with the arm for the last few millimeters of build height.