Purchased this tonneau for 2014 SE after having a similar ACCESS on an earlier model. I like the look of the model and the ease of securing it, much better than the ACCESS. My problem is that at speeds above 65, the canvas not only ripples but "thunks" making a discernible noise. I called Extang to express concern and ask if they had similar feedback. Their rep was very nice but denied having this issue raised. After experiencing much frustration I duct taped one inch blocks of foam insulation to the center of each strut. It has virtually eliminated the noise but puts an ugly arc in the top with the blocks showing through the canvas. I was very surprised that there was so much fabric that I could easily place the one inch blocks on the struts. I have since talked with Extang telling them what I have done and expressed my sense that there is too much fabric in the top causing the problem. They wonder if the aerodynamics of the vehicle cause it. Extang is planning to send me a replacement top and while I appreciate their effort I have little confidence that unless there is a difference in the new top that the result will be the same. Has anyone had similar experiences and do you have any suggestions on how to resolve this problem? Thanks for reading and responding.