Clip on tarp pullouts sold by Dutchware anyone try these out. Watching the video of Dutch showing how they work they look interesting. If you have tried them any problems? Ever have one fail? Would they work to stake out sides of hammock a bit too? Any material that would be incompatible? I'm thinking of adding two stake out areas on the side of my hammock like the WBBB has on sides of its bug net. Would these work?