Yes, good point about that panel being a later addition, and indeed those switches look different to the others. I had meant to ask how high the stems/levers are on the switches you used, so thanks for mentioning that - I had thought they might be a bit longer than 1/2". I think the switches I am looking at on eBay are longer, but I'm not going to stress too much about that.
I am building a Pertwee console, based extensively on your research, of which I am extremely grateful for. You have done such an incredible job, and I am not sure I would have embarked on this project if it weren't for your work! Mine is constructed a bit differently (to make it more modular), and I am severely "woodwork challenged", with no prior woodworking experience & only very basic tools, so it really is a significant challenge for me. I am expecting to have to make a lot of compromises, particularly when it comes to the controls (difficult to find some items without spending a lot of money), but my take on this is that I can replace substitute items for more accurate ones over time as I find them. I am currently part way through, with the hope that I can have enough completed such that I can display it at a local convention next month! I decided not to do a build diary in here until I am at least at a stage where I am fairly confident that it will all go together. I'll probably wait, though, & do more of a retrospective post about it, maybe after the convention.