I went shopping to purchase anchors today. The guide rails (second picture) use 11 anchors per rail and the Water Wizard rails (last picture) use 22 anchors per rail. So I need 66 x1/2 x 5 1/2″ or 4 1/2″. I will know after the install guy tells me which one he wants to use. I also purchased some 1/2 all thread to install the boom and misc. anchors to anchor misc. things.