Fitting test Bridge/Tailpiece plate.
Considering the repeating of the plate setup/remove, the M3 diameter anchor nut 'ENSAT' are installed because M3 wood screw loose the hole by driving screw/unscrew in repetitive work.
No spare of ENSAT model #309 in stock, so re-used from the other. Special insert tool for ENSAT can not be used for re-used one, so M3 size screw and Nut are used.
---------
Recent music on work.
MY GENERATION, THE WHO.