The height limitation of the proposed V2.1 version of the FST T-Board is 6.2 mm on each side because it will be "sandwiched" between the Inner and Outer Hybrid.  We test soldered an Inner Cable to a a V2 T-Board to see if there would be enough space for the Inner Cable to connect to the V2.1 T-Board.

The caliper in the picture below is compressing the wires a slight and acceptable amount.  The 6.22mm measured also includes the ~1.1mm thickness of the T-Board PCB so the wiring only extends 5.12mm above the T-Board.