BKrenning, this is my first EB pattern. If I repeat it, I will cut all the square parts to fit, but may leave the triangles bigger. I have been able to use my Omnigrid 12 1/2 square ruler.
On the plus side, 18 blocks - my first with triangles and they were all perfect!!!! They are set on point and I have my 1/4" at the tip of each so I won't lose any points. Yay.