Just got a Metroflash Nocturna rear light for my helmet, but I'm having trouble making the velcro strap fit through the oddly-shaped vents. It does seem to clip quite handily onto the webbing at the base of the helmet strap assembly, though (between the two rear helmet reflectors). Is this an OK location? It's halfway up my head, so it should be pointed straight at onlookers. Or maybe i should be worried about an electrical short setting my hair on fire....