TD, Have them say things like you are a great instructorand teacher, easy to get along with, a leader in the air and on the ground, has a strong desire to become an AF officer, strong moral character, the AF needs leaders like him, I give him my strongest personal recommendation, etc. They should know the catch phrases the boards are looking. A letter from your uncle never hurts but being an LTC he has been around and should know some people that may be able to open doors. Good luck.