Beautiful work. Even more impressive is the fact that it looks like you didn't spend much time in the UK and you have some classic British boxes. Glad to see you did the "calculator" keyboard on the PET rather than the later more conventional keyboard. Would like suggest the ZX-80 and the Research Machines 380X. Some of the early Sun, Interlisp, Xerox, and SGI machines would be fun if you wanted to venture in an adjacent direction, as would a scale PDP-11. Very well done!