Hi! I recently assembled my new EX-5 and the handlebar stem is quite loose. The brass bolt with the plastic handle wasn't inserted correctly at the factory and it won't turn to tighten the stem. I've contacted Echelon for a warranty claim and gave them all the bike info but haven't heard back after a few days. Are they slow to respond? The wobbly handlebars definitely get in the way of a pleasurable ride. Looking forward to sharing ride experiences once this gets fixed 