Wiz:
I just got moving and haven't had coffee yet. All my measurements were taken from the left side of the board so you will have to do the math. I refuse to add or subtract fractions without coffee.
Width of board 3 1/2 "
first hole 1 1/2" from LH edge of board
2nd hole 11 7/8 " from LH edge of board
3rd hole 22 1/4" from LH edge of board
First notch is 9" from LH side
Notches are 1/2" deep with rounded corners
Notches are 1 1/4" wide
2nd notch is 13 1/2 " from LH side of board
Board total width is 23 3/4"
You don't show the small supports in the top corners of the board
They are cut from 3/4" stock and are 2 1/8 " long and tuck into the very top corners of the board and support it to the cabinet. You may have this already.
pi= 3.14159265358979323846264338327950288419716939937
off to drink coffee now