That's impressive and good luck. So sorry your dad is no longer with us. I had an Altair and disk drives which I loaned to a friend for safe keeping, no doubt

That's impressive and good luck. So sorry your dad is no longer with us. I had an Altair and disk drives which I loaned to a friend for safe keeping, no doubt in a landfill long ago. But I still have the IMSAI, less disk drives, and boxes full of S-100 cards and original documentation. It might actually be operational with some ribbon cable replacement. No correspondence, but I do have a copy of Midnight Engineering, signed by the OTHER Bill Gates. No plans.