Pulled out the RC yesterday and noticed the power port cover-plug was missing. It came off this weekend but I thought it was secure enough for the few flights I did afterwards. Well, after racking my brain yesterday I thought I'd try some earplugs that expand. So off to Walgreen's I went and found the above. It works OK with a little trimming but its not very secure. Anyone have this happen? If so, what was your fix?