I am glad you bumped up this thread! I am building another shack myself, my second one. I sold my others. I was looking for pictures of how guys built their roofs and to get some ideas the last few days. I built my 4x8 with a flat roof, but this time I am building a 6x8 and want a pitched roof and am not sure how to build/design it. I had a few ideas but your jig is a great idea, I think that will help me out...thanks! Nice shack by the way, just big enough to be cozy.