Started working on an airframe ground. I am using a piece of copper bus bar 1/2" wide and 1/8" thick that will be attached to the airframe with countersunk #8 screws. I will solder some faston 1/4" attach points and have a couple of bolt attach points for the battery, avionics ground that will be #8 cable run back from the firewall, and a cable to the GPU plug as the ground for that plug isn't great due to the RTV I used to seal it.
