I don’t understand why you keep posting that.Because it was the original balanced power supply direct coupled (matched) complimentry jfet buffer that Nelson designed for the Lightspeed.
Afterwards it became (I believe the cruder) unbalanced supply re-configured capacitor coupled p channel jfet buffer (didn’t need to be matched) for the B1
Once again go away your stalking, also calling my product "thing"? you really need to see someone.
Cheers George