Steve leigh

Hey I've tried to install a home made wake gate on my 2006 sv230 and the rear of the hull has slight curved at the lower section of the hull preventing the suction cups from sucking to the hull. Then when I stick the suction cup to the flat portion of the hull located directly above the previous location it sucks right onto the hull. So I am wondering if the naticurl has smaller or better quality suction cups that suction on to the lower slightly curved portion section of the hull. Any suggestions???