Occom wrote:

It's curious that those who caution against the electronic substitutes want
dual alternators, dual (triple) batteries, dual DC bus, and more to run the
normally vacuum driven instruments.

That's because the vacuum instruments have an electric backup in the turn coordinator
or turn&bank. If you use electricity for all of your instruments, there is no backup
when the electrical system fails. The solution is to put in a backup electrical
system.

Perhaps it would be better to start using the vacuum system to drive the turn
coordinator and install electric AI and DGs?

George Patterson
If you don't tell lies, you never have to remember what you said.