The Spinger Tremolo is a drop-in fit upgrade compatible with vintage hardware arrangements based on the Gibson-style Tune-O-Matic/Stop Tail Piece and available with a choice of Sophia saddles: Standard, Deluxe Locking Saddles and Macro-tuners. Body to string height at bridge point is min of .665".
An Adaptor Plate secured to the TOM position by M5 or M8 bolts associated to the existing body inserts to provide risers posts for the 2:92 base plate ...
A Spring Plate extended to include the M8 or 5/16-24 Rear Spring Bolts to hold the dual-spring arrangement ...
Simply pull off the earlier hardware, rebuild with provided elements, etc.