..fix a surfboard. Here is the board in all its $75 glory. It was a bargain as one we bought last summer was nearly 4 times that price and that was the cheapest 2nd hand one they had! The soft bit is right in the center of the board about 12 inches in diameter.I've drilled holes in an evenly spaced pattern across the entire patch to be fixed using a 1/8" bit. I know need to leave it a couple of days to dry out in case there is any moisture inside.