Just a moment and sorry that tube making didn't go to right emailng list but it was worth looking as this skill was the BASIS of making early tubes back then, in fact, hardly haven't changed at all and much of the refining went into increasing and making tube more sensitive and responsive. Now that is put aside... about the Mac that I no longer need anymore and sitting gathering dust. I tried to look around on ebay to see how much value on 8100/200 and google. no luck. Is anyone could take this Mac or in pieces? Have to ship. It's kind of upgraded in many areas: 2 HDs I think one is 2.1GB and other one unknown but i know both are 7200rpm (have to check) running OS 7.5 or something for speed. 192MB total of totally mixed memory, leaving 2 slots left and 256K cache stick. HPV video card 1MB with spare memory waiting to be filled up. CD 2X scsi as well. Been few years since I last used it, it's clean and running. Cheers, Wizard