I mounted a Cateye EL530 http://www.cateye.com/en/product_detail/345 on the front handlebars, and am having trouble getting it to stay level. The vibration from the ride causes the light to point closer and closer to the ground, and I'm reluctant to try and tighten the mounting strap up more for fear of breaking it. I bet I'm not the first one with this problem, what have others done to solve this problem?