barryj, I did it to an older board (no grinds left) I have to mount a plate system directly to the board.
Unless you are experienced with this type of work, I would recommend finding a builder or an experienced shop do the job, specially on a newer (good) board.
The cost of the materials (countersink, inserts, epoxy, P-tex) alone is not cheap.
While the integrity of the inserts/ epoxy does not seem to be a problem, the finish on my P-tex plugs leave a bit to be desired .
Don't tell me, "Show Me"
765 grams = 1.6865 lbs. or 26.985 oz.