Thanks Ed & Sean. I knew I had saw a picture of one on a 60 before and thought the glass base was 6". I just didn't want to start fiddling with it and have a problem on my hands.
Thanks for the help guys as always.
Mike

Collecting Conoco, Gates Rubber & Tires, B.F. Goodrich, Cliff Brice, Vickers, Mobil, National Refining Co., Philco, Ma Bell and Pikes Peak Hill Climb!