By violating the centerline-to-edge feature, you will likely experience a bulging on the edge of your panel. Once bulging occurs, one can expect some reduction in performance of the fastener due to the material not flowing into the undercut of the fastener. What performance to expect is difficult to predict and will depend on the installation and the application. In order to prevent some of the bulge, a tool can be made that braces the edge of the panel. You have to take great care doing this to ensure the product does not stick on the tool during install. Also, the performance will still be reduced as the hoop stress of the material is compromised by the thinner section of material. If you can live with the bulge and a reduced performance value, it is likely you can still use the parts in your application.