I use a Rhino surf soft rack, very similar to irishpete, with hooks to the edge of the poptop. had 3 surfboards and a wakeboard on there this weekend with no issues. I wouldn't see an issue with an 11 paddleboard, just be a case of positioning the straps as far forward and back as you can. I don't want to unload the boards when staying overnight so this was the best option i could find. Most paddle boards have rocker to the nose like a surfboard, so lay it upside down and this will push the board down onto the poptop at speed, avoiding any lift.