If you’ve taken a picture with a squad of Stormtroopers at Costco, or high-fived Darth Vader and a battalion of Clone troopers during a local parade, you may have encountered the 501st Legion. More than 60 Star Wars characters from the Orange County squad marched in front of a spaceship float during Tustin Meadow’s annual Fourth of July parade. “When I’m in a helmet, nobody sees that…