I've noticed a recurring problem with my Wixey scale on my table saw fence. About once a week I have to recalibrate as it gains roughly 1/4"--meaning when I put the fence flush against the blade it reads -0.2xx". I've changed the battery so that's not the problem. Its happened several times now over the past several weeks. Has anyone else seen this? I've fired off an email to Wixey as well, but I don't expect they'll be around to read it until Monday.