i make my scrogz with 1 1/2 to 2 inch squares..i just kinda eyeball it...i like to use some small self tapping metal screws...just drill a smaller pilot hole and use a screwdriver or a small socket (depends on what kinda screws ya using) and leave just a lil of the screw stickin out so u can wrap the string/twine around each screw a couple times as u weave  it back and forth from side to side.. keep pressure/tension on it to keep net tight...i have a couple pics of a small scrogs in one my albums pics