WOW!!!! Now I really feel old! I started with uncle sam doing 1A1 key systems. There were just a couple of things that you didn't loose. Your butt, telephone test set and your wire wrap tool. All in that order. I thought that Christmas came when they gave us the "zip" gun. Whew...old age. I wish I had .10 for every lamp I changed. I sure changed a lot of them on the 5, 10 and 20 button sets. RBF, if you want to really blow them away, explain the diode matrix ringing to them! LOL