One Word:
Hilti.
Seriously:
you could install the tremolo tailpiece to cover the holes....
The trem tailpiece, with ABR-1 bridge, and nylon saddles, "is" the Dicky Betts setup.
IMHO, the best sounding setup for an SG.
The nylon saddles make a huge difference in controlling the microphonic feedback with a very high gain amp.
Not gonna bother with it...and i would throw it in the fire before i would install the poop-engineering of a Bigsby on anything.
