Sounds like a great project Will. I have all of those books and the Streamliner mag, but have yet to find an interior cab photo of the 5000 series TTT. Obviously Bassett found it.
BTW, I have turned over every rock in the UK I can think of trying to reach Peter. Found where he got a permit to make a 3 apartment complex out of his hobby shop in the mid to late 2000's, but finding more info has been fruitless. Even had a friend and member of the UK O Guild Gage ask around about him, but to no avail. He must have been a loner. Would very much like to discuss his TTT loco in detail.
Butch