Very interesting ,
Well I've been saying for years that it is a 12 ch desk x 4 subgroups - all anyone has to do is count the track faders to give to the channel count.
The KT wiki entry still calls it a '4 trk'.
I am sure this confusion came about because KT was a '4 trk' studio eg: 4 tape channels. (maybe they went to 8 later on)
I also don't believe much was done in the way of modification except for maybe adding new faders - which BTW I believe are drop in modular possibly involving no soldering even
Some type of mod to the spring reverb I could believe eg: building it into a case/chassis and maybe getting another spring tank, but for the rest there's not that much you can really 'mod' on one of those Fishers - very simple simple device & circuitry.
KT obviously had serious electronics skills given his repair, service & amp building career - but the idea that he heavily modified his studio stuff beyond reasons of repair & ease of use doesn't make sense to me - what would be the point? ...
The desk itself is IMO 100% certain to be a mid 60's Jeep Harned custom MCI console... prior to the launch of MCI as a company, when he was building stuff to order in his garage. Certainly very few of these consoles were made - probably less than 10 in varying configurations I would guess.
Here is another studio in Cincinnatti, named 'King' funnily enough - which had a near identical console, just with more channels & extra sundries. You can see that it had to have been the same builder, around the same time.
You can see it has those rounded 'EMI' style faders (Painton quadrant)- I am sure that's what KT changed out on his own desk for flat & smoother Altec or Langevin style faders (though leaving the original rounded faders in the group section) .. the EMI/Painton Quadrant faders were stepped in 1db increments whereas the Altec/Langevin type would have been a smooth, linear or logarithmic taper..http://www.bluejeansplace.com/KingRecordsStudios.html
"I worked at Criteria Studio in Miami before moving to Cincinnati and I tried to take what I had learned from the guys at Criteria and apply that knowledge to KING's facilities. Remodeling and cleaning KING was a high priority for me. The remodeled studio was modern and equipped with a console identical to the one that went into Criteria's studio A in l966. Jeep Harned built both of them simultaneously at his MCI Company in Ft. Lauderdale Fla. MCI stood for: Music Center, Inc.