For the validation, we have:
1) Run nanoFIP JTAG VERIFY cycles: one of the boards was acting as the target TAP, and another was receiving JTAG frames corresponding to the VERIFY_6A11.svf firmware.
The cycles were completed successfully! Also for confirmation a different VERIFY firmware was sent and the JTAG cycles failed.
2) Kept the boards (each one with a different configuration in terms of speed, var size, model/constructor etc) running in loopback mode for 3 days, with the heaters at 100% (temperature measured on surface by the sensor: 40oC). No error occurred!

_* Note: The following NFTC boads are housing the First Article units:
31.25 KHz: 201104-010
1.00 MHz: 201104-007, 201104-016, 201104-019
2.50 MHz: 201104-011_