Cool if it just passed through RGB I already have the parts to do that for less cost. Cool idea tho, I think I like the idea of an enclosure that the PCB could rest on while using. What video encoder are you using this with?
I just have standoffs on the supergun, and have them screwed into a piece of plywood that I cut (and plan on painting). I wouldn't want to just have the thing (and the PCB) all loosey-goosey, but the wood makes a nice platform for the PCB to sit on.
I don't use a video encoder. PVMs 4 lyfe.
Edit: The two nice things about the supergun are the voltage readout (let's you use an adjustable power supply) and the video intensity adjustment knob. I've noticed that the video levels from some PCB are stronger than others. And some PCBs definitely suck more juice than others.