I get a lot of mails regarding the boxes and plugs I use for my Hon30 modular layout. So here’re a couple of sources or details that may help you to find similar stuff for your railroad project.
I buy my boxes at www.boesner.com and they were original designed as wooden canvas for paint art. The product is called “CASANI” and available in many different sizes. Since Boesner is a German company, they may be available in Europe only. Anyway, I got two sources for similar stuff in the US, listed below. If some one can tell me a similar product range in GB – feel free to tell me and I’ll add them here as well.
Germany / Europe
Plugs & Sockets
I use 4mm Banana plugs for panel installation. They are available in several types from Conrad.de and may be available to your country as well. Otherwise, please see the product descriptions below. You may find similar products at your local store. I recommend sockets, which have an all-though hole to take the plugs. Please note, the blow links will lead to the German website of Conrad.de.
As usual, feel free to contact me in case of further questions.