The eye of providence or the all-seeing eye is what it's called. Some will say it's the symbol of the Illuminati. Also the Freemasons use it. The eye of God is meant to bring providence. In mine the eye is bleeding but is still seeing even through blood and storms. The triangle also has meaning in many groups and religions. You can Google it for more details if you like.
Not usually but things like recapping stereo components or if I can get a schematic I can sometimes fix them. I have a couple local customers I do some stuff for.
