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Ofrogg, "Frankly", I'm not going to explain the geometry issues of your oar stands. There are plenty of threads on the buzz that can help new rafters with those issues and I don't want your thread to turn into another one. The grey is kinda weak, but you can't win them all. Also, those clamps are not going to keep the oar stands on that frame. You may want to look into another option like some good 3'' nails or maybe put another clamp or two on each stand. I guess if you're just running flat water you'll be alright. Let me know if you need any other help.