Breaker Switch
I ordered one for my avionics master and the mounting treads were so out of tolerance that nut would not grip for mounting. Made me really think about the quality of the internals. Guess where it was made. Got another which was made in Mexico and I will install that one. Which brings up another point.
I've got 2 batteries, 3 GPS, 2 coms, 2 sets of flights instruments, you know the routine.... yet my local avionics shop recommended an avionics master. All the certified have them. Guess what? A single failure point and a Chinese switch at that.
My solution. I ran a parallel circuit between my main buss and the avionics buss with a circuit breaker. The breaker is under the panel and easy to find and reach. I leave it open (pulled). If my avionics master fails, I push in the breaker and back in business.
Something to think about.
Ken