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?