Hello, Kent, what a great collection ! I`m Friedrich from Germany, began collecting tapes 2 years ago . Now i`m collecting still only TDK, only 90 - minutes - tapes sealed, and the other TDK, that was never produced in 90 - minutes playtime. But i miss some, - can you help me ? I would be pleased, if you could send me an answer. I wish you the best, kind regards Friedrich