It’s always frightening to see a 30 lb. steel contraption on the top of a guitar...
But Mark’s fret buck sure makes the upper frets go in nicely. It provides support to the fretboard extension so that the frets can be hammered in without the extension bouncing and vibrating. There are two “fingers” that push up on the underside of the extension when the big black knob is tightened. The more mass the better. Mark torch cut that beast out of 5/8” steel plate.
