FWIW I did a Chung test recently testing for CRR and holding aero constant and got a combo of a rear 25mm gp5000 and latex with a front Vittoria pista in tiny 19mm below .004 on just the standard tarmac in front of my house.
Even outdoors track tires should be well under .004. I think .004 is giving away some.
Good powah!!! Saw the ST posts. Would fit pictures give away any of your CdA secrets?
That CdA would have to be with some great kit plus a small person in a great position.