a beautiful boat should sail forever.
any worn out or mislocated holes. I tested several plugs, and found that FULLY cured RAKA epoxy, in a 3/8" hole, tested out best. The 3/8" diameter allowed adequate location correction so that the pilot hole drill could be centered on the string. The pilot hole drill should be the diameter of the screw body. I used 3/4 #8 pan head screws. You CANNOT use # 10 because it hits the flange and skews the track. I did the screwing by hand because 1) you can strip the threads in the hole with a drill, and 2) with a brace and bit it was hard for me to get the screw in straight (vertical), which means that it will contact a flange and tilt the track, or pull it out of alignment.
Advantages of the 3/8" epoxy plug are that it waterproofs the hole, as well as removes the sorry material surrounding the original hole. DO NOT DRILL TO DEEP OR YOU WILL BE POURING EPOXY INTO THE MAST CAVITY, IE DO NOT DRILL THRU STAVE. It might be worth while to let the air bubbles come to the top before pouring, or mix more slowly to avoid the air bubbles, which will come to the top once poured. and try not to overfill (like me), but make sure the hole is filled, which may require topping off as the epoxy is absorbed. Best way to fill is Harbor Freight squeeze bottle.