Multiconnect Non-Rotating Threaded Connector

This is a remix to @davidd's excellent multiconnect system. This large thread connector connects to the Multiboard system firmly while allowing you to quickly add and remove multiconnect-compatible mounts. When threaded fully and into a vertical position, only one connector is needed (also helpful when only one connector is possible). Differences from the large thread, side-printed, tool connector: Elongated to prevent rotation (when fully threaded) for single-connector mount scenarios. Reta