This whole business started with some custom parts for my own bike after a trip to the bike fitter. The frame is a Velobuild TT-023.

Custom parts:

1. Mounting plate for the aero bar extensions with additional reach, larger mounting surface, and a BTA mount.
2. Top spacer in the stack to add an additional 9 degree angle to the aero bars for comfort. The lower spacers are off-the-shelf spacers for this bike which are not available with any angle.
3. BTA system with a 10 degree wedge to get the bottles flat, risers, and a bottle rail.
4. Computer mount on the front of the BTA rail is visible without looking down and sticking the tail of the aero helmet up in the wind.