Guys who were in the USAFR units, and perhaps involved with their units recruiting, said that several years ago (late 201x's?) USAFR SUPT slots were going unfilled. That's a mind boggling concept. IDK if that's still true now. I'm guessing, or they stated, that the slots would be returned to the active duty side of the house. They also menitoned I system that I wasn't aware of - you could get a generic USAFR SUPT slot not specifically linked to a particular unit. As you progressed they'd find a unit for you. That's another mind-boggling concept as a reservist.