No go
I fly out of LAS weekly and am both 1K and UGS - no go for a FC stamp as the TSA has forbidden UA from stamping tickets any longer and has threatened to fine them if they stamp anything other than a FC ticket - which TSA knows is impossible as LAS is an all TED location with no FC seats to speak of.
It is a real bummer when there is a 1 hour security line and the FC security line is empty.
I see no solution to this problem, given TSA's involvment.