For my shelters I have often used a GI poncho in warm weather and a 8'x10' tarp in cold weather. My preference has always been the poncho, due to it being lighter, packing smaller, and being a multiuse item (worn, overhead shelter, bivy sack). I know two GI ponchos can be snapped together to form an 8'x10' shelter, but it leaks at the connecting points. Has anyone ever figured out a way to prevent it from leaking? I've been racking my brain over the past few days to try to figure something out.