One other tidbit for those that travel with boards on top. - ALWAYS use two straps on the front, one to secure the board(s) and the other for a back up. Generally, new straps will not fail, but as they age and get cooked by the sun, they begin to wear.
On a long trip at 70 mph with two boards on top, I left the highway on to a side street where the front strap suddenly broke, luckily while moving at only 30 mph. The boards shifted to the side, but did not fall off. From that point on, I always used a second "safety" strap on the front.
I shutter to think what may have happened if the strap broke 5 minutes earlier on a highway filled with cars.
Formula 160; iSonic 111; HiFly Move 105; Tiga 263; '85 Mistral Superlight.
Maui Sails TR 11.0; 9.2; 8.4; 7.6; 6.6; Maui Sails Switch 6.0; 5.2; Maui Sails Global 4.5; 4.0.