No that info came straight from Stax. I didn't take it too seriously though as it was so silly.
Not going into a detailed circuit analysis of the T2 here but they basically took a circuit they had (SRX) and threw a bunch of parts at it to make it just about work. The BH was based on what Kevin knew about the T2 circuit so he came very close with a lot fewer parts. It can still be done with a lot fewer parts still and give better performance.