Small service adapter for more easily loosening and tightening the rear-lamp retaining fastener during bulb replacement. The creator specifies PETG plus an M5 heat-set insert, an M5×6 socket-head screw, and a DIN 9021 5.3×15 washer, and source photos show the assembled tool on the fastener. Use it only as a hand tool; do not overtighten the lamp fastener, and inspect the printed body and insert before each use.
