Thanks to you kind folks I almost have my Williams Skylab machine working 100%. I seem to have one last problem where when I hit a target that scores 10 points, it seems to stick sometimes scoring a bunch of points 10 at a time. It will eventually stop and doesn't do it all the time but I'm not sure what would cause this to occur. I lightly touched all of the scoring switches thinking one might be too close and although they are sensitive, none are sticking. Is there anything else that would need adjusting or cleaning that might solve this problem? As always I really appreciate the knowledge that you folks share.