The Zacuto Zicro micro mount is a purpose made monitor mounting bracker for use with the Zacuto mini articulating Z-arm or other 15mm round parts like the Redrock microspud and Redrock Micromount.  Not only is it sturdy and secure, but the quick release thumb lock allows for fast monitor removal.

This version features a single screw hole 1/4" and 15mm hole with quick release.  See the larger Zacuto ZicroMount III as an alternative to attach heavier kit to your camera or rig.