Thanks Jerry, I have read your pyramid article a few times. There were a few things I found a bit confusing, but overall it was very helpful. I think I just need to start putting things together.
"I've made a few of these waterproof type shelters." Ha, ya that is a bit of an understatement! Your website might as well be my home page for how often I drool over your shelters! I have no expectation of producing such a quality shelter or saving much money with my MYOG foray, but I would like to develop the skills to be able to tailor and make a few unique gear items for myself.
My fabric is barely 60". I'll take another look at maybe tweaking the height a little to preserve primarily the length and secondarily the width. You are right in that I maybe able to get by with only an extension on the 5' base sides. Thank you very much for the hints.