| well if you want a t grain over your crack then its a bit challenging, if you want cross grain(if i recall the correct method), depending on how big you want them youll have to find your lengths, these have to all match, so for example, cut a piece of straight grained spruce one inch thick into a long rectangle, then you have to make / marks, one with black sharpie going one way one with blue going the other way, measure an inch on it long ways to make sure your all square there, now when two x's connect you will have a diamond, cut all your blues, then cut all your black, and there you go, you have a uniform set of diamonds, i really dont recall how my boss does it, so this me trying to remember something logicly, if it works...I THOUGHT OF IT FIRST!! haha | 
