Construction tips for PCB-mounted tubes?

I'm building an amp with PCB-mounted tubes for the first time, and I was wondering if anyone had any tips for how to arrange everything in the enclosure. Does anyone have any pictures of what they did for projects with PCB-mounted tubes or suggestions on how to fit everything in the box in the best way possible? I'm mostly interested in seeing what people did in terms of shielding the circuitry from unwanted noise or that kind of thing

Thanks