Ward,

The taper at the bottom would have been the challenge. Figuring the smallest diameter of glass as the basis for determining the number of lines you could achieve on one glass, I don't believe there is any way you could etch more than 9-10 dates on it. But of course, you have to take into account that the 1st, 5th and 10th may or may not be a larger font. Man, am I glad it worked out the way it did.