I don't think I'd ever intentionally switch to Philips head screws for anything. Switching to slot head makes sense if you want to be able to turn the screw with just about anything in case you've misplaced the screw driver, but they strip too easy. Philips head screws strip far too easily, and few things work instead of a philips driver to turn the screw. Torx were made to tick off the world. Robertson don't strip nearly as easily as philips, but are harder to come by. So why not just leave the hex head in there? Somebody at the track will have a driver you can borrow.