The replacement unpunched flap ribs arrived from Van’s; the lower flange of each rib is not punched. I was anxious to try them and get going on the flaps. Long story short – the flap skins were mis-bent and no amount of tweaking with the ribs would fix the problem. I spoke to Joe Blank at Van’s and asked for new skins. To his great credit, he shipped them right away at no charge and with no complaint. Thanks Joe!