I finally decided and went for a professional fitting. It turns out that I need a custom frame by a large margin (I am 6’5 with long legs). The whole experience was very interesting and I was surprise by how small a frame I need compared to my road bike.
Anyway, I am now looking for a custom frame and I am thinking steel.
Take a look at Zinn, Seven, jamesframes.com, Yamaguchi, and HH. I’m pretty certain that Zinn, jamesframes, Yamaguchi, and HH all have access to the TrueTemper aero tubing. Zinn is big on big boy bike builds, jamesframes has a bit of a cult following among sub 50 minute 40k TT riders in the midwest and on a side note has several Project '96 tubesets laying around his Boulder, CO shop. Seven can build great bikes, but can alos build terrible ones.
I say go with Yamaguchi or Mandaric (Yaqui for tri). Both build awesome rides, both are masters of their art. I seriously doubt you can go wrong with either.
do not forget a waterford! mr’s schwinn and mueller have forgotten more than many know about high end steel frames. they know tri, and are way up to speed on s3 tubing - just ask b lindquist, kicking a$$ and taking names on a steel ( NON-AERO…) waterford. wonder why the tri world hardly notices this…