duramax747 - good score!
My forensic observation reveals that crossover production for various models was taken to China/FST and that early FST crossovers had weaknesses and improved over time. However, it seems that FST XOs used MPT/polyester caps where Thiel had always used (superior) MPP/polypropylene.
Additionally, we know that Jim personally checked, measured and approved review samples. So, your pair is what a hot-rodder would call 'blue printed' - exactly as intended.