A method, system, and user device are provided for provisioned talkgroup identifier discovery in a dispatch or similar network, in which a user is provided with a list of talkgroups provisioned for the user device. Closed loop DMD in particular can achieve such changes on an existing tool with proper alloy matching and close dimensional tolerances. Accordingly, the movement of the fitting protrusions is restricted both in the width direction of the plates and in the mount direction of the plates.