I need to see some pictures of Parkers on a trailer. Specifically, I need to see what the center is resting on. Mine doesn't actually rest on anything. It's completely supported by the two bunks on the sides. I wasn't worried about this until my neighbor said something. When in place, it is perfectly balanced on the bunks and doesn't put any pressure on the jack stand. Do I really need rollers for support of the bottom near the bow?