I installed the bottom AOA port and self-designed heater elements. I sealed the nylon flange to the wing skin using hight-temp RTV, and pressure tested it per the AFS intall instructions. Nylon screws are used to insulate the mounting plate, which will be electrically positive from the wing skin, which will be negative. I predrilled the upper AOA port, but didn't dimple it or install it, as dimpling requires two people and the installation can't be undertaken until the wing is riveted, anyway.
