I found a road killed fox squirrel and skinned it- removed the fur by ripping it off. Cut away the belly skin which seemed weaker and it was a lactating female so had mammary tissue on it anyway. Now I guess as best as possible I cut the skin spiral style to get anough length for a bowstring, then twist is and hang a weight from it. Is that right? How wide should I make the spiral strips? 1/4"? 3/8"? Other instructions?