Do more revision of the electrical schematics. I finally got the distribution of power that looks good. Decided to use the battery bus for the ignition switch power at 7.5 Amp. Additional ports on the battery bus are the Elevator Trim (1A), the Roll Trim (1), the Flap Position Indicator (1A) and the Clock (1A). I am not sure I will install the Roll Trim; since I have the TruTrak autopilot. I will connect the elevator trim since I installed this on the elevator a long time ago.