Mine work (both of them.) The discussion on the V8SHO list concluded that they are fairly accurate, too. They overstate the trap speed compared to what the 1/4mile tracks use, but only by a couple mph. It's been s***ty conditions out there for a while, so I haven't had any new times to post. Every time I get out of the city, it's raining, snowing, icy, too much traffic, etc.