[bridkarl]

Just a thought -- my multimeter has the option -- which was $10 extra - for extended probes. These extensions are a good idea I think -- they keep my hands a little further away from the chassis. Handy for testing resistors layered down in the radio. Just noting from the pictures of the multimeter in place.
As to this project -- I replaced the 120 volt "christmas tree" style bulb with a C7 Led bulb. Works fine. Not sure that's an option here, but it's much less heat and lower wattage and will never have to be replaced.
I also noted what looks like a silicon rectifier in the corner there. Might be worth looking at. I also tend to plastic sleeve cap leads. Probably overkill, but it looks good and prevents any accidental shorts when caps are next to each other, the chassis. I think this is on the right track overall. Looks good.