I've got a Yakima roof rack system w/ a Raptor (upright) tray, works well, fairly quick getting the bike on and off the roof...however, I've always liked the "streamlined" looks of the fork mounts. Last month I got a CopperHead, again it works pretty good; however, something i noticed about the fork mount, is it seems that if someone wanted to, they could unscrew the one end to get the fork out. Does anyone also use a cable lock when securing the bike? I was just curious what other's used and why?