Custom and Universal Projector Interface Bracket for RPM Projector Mounts Chief offers the SLM in custom and universal interface bracket options for the RPM series of projector mounts. - For the 1st generation universal brackets see SLMO - For the newly designed 2nd generation universal brackets see SLMU - For custom interface brackets see SLMXXX or Chief's MountFinder Pro to determine which model number matches your specific projector. - Compatible with RPA Elite projector mounts - Custom and universal versions of SLM projector interface brackets available - TAA compliant