There's a young track guy in Finland who's got remco-tier aero positioning on the TT bike, according to his testing his CdA is just under 0.17 on the track and 0.185 on longer TT's. God damn, he did a 10km TT at 50km/h with just over 360W. He also does aero consulting so I'll probably do some testing with him in the future, see if I can get my speed any better.