I've noticed that there is a big difference in how much different people tighten their tie-downs. Seems like some guys are trying to break the straps while others are content with just snugging them up. Personally, I think excessive tightening just puts undue wear on all components involved, especially the strap itself. If the straps are just snug, where can the boat possibly go? Is there any published data on this or is it just guess your best?