My skateboard rack I took a piece of 1″ x 8″ white pine I 1/4 rounded both sides of the front edge. I measured in 4″ from the back making a mark from top to bottom (LIGHTLY), then on that mark from the bottom at 6″ I made another mark then every 4″ up after that.
Using my speed square I made marks at a 45° angle from the front of board (2 marks per hole top and bottom). Using a drill press; 1 1/4″ hole saw I drilled the holes out on the 6″; 4″ marks (not going all the way thru cause I want smooth edges on both sides).
After drilling the holes I used my bandsaw to cut my 45° angles, taking a dremel; sanding barrel I smoothed the holes out. Taking a piece of 1/4″ Burch plywood, I cut too size needed; attached too the back of the 1″ x 8″ boards. On the bottom I made a shelve for extra parts; added a brace in the middle for hanging strength.
Finally smoothing all edges; corners out using my sander and dremel tool.