Well, we are having Internet issues again so we are trying a new router and it won't recognize the Internet for whatever reason. I do have pictures but they will have to wait. Here is what I have figured though. Very little math. And maybe double check with paper before cutting. Measure half the width of the block. Unsewn. And add 1/4 inch for the strip to cut the triangles out of. Now for those with the super 60. Use the opposite end of it. The rest can use the 30 degree mark on their ruler like you did the 60.