Hi everyone, I just successfully repaired the CRT on my ADM-3a, which was suffering very badly from "CRT cataracts". Here's a before and after picture: http://www.loomcom.com/junk/adm3a_lens_removal.jpg On the left, you can see the CRT removed from the ADM-3a and supported in a cardboard box for repair. I've already cut through and partially removed the sealing tape that went around the edge of the CRT and the lens. The cataracts are clearly visible, they were extremely bad. The adhesive between the CRT and the lens had broken down significantly and partially liquified, leaking through the sealing tape. On the right, you can see the CRT after removing the lens and peeling up the sheet of adhesive under it with the aid of a razor blade. I used a heat gun in concentric circles over the face of the CRT, the technique shown in this series of videos on YouTube (not mine): https://www.youtube.com/watch?v=5l1EoMmmOcQ I just wanted to confirm that this technique works well. I have not yet finished cleaning the lens and CRT, but after that's done I will apply double-sided tape, re-attach the lens, and seal it with packing tape, as shown in the videos. DISCLAIMER: If you do this, you are doing it at your own risk. I wore safety glasses, gloves, and a long-sleeve shirt. There is significant risk of CRT implosion. -Seth