I will be happy to do so as much as possible. At the time my two amps were worked over they were done by Jim himself (which he no longer personally does, to the best of my knowledge). They were done about a year apart with every upgrade then available with respect to condensers, resistors, etc, The modifications were adding three pronged power cords,switches to allow either pentode or triode operation, and KT-90 tubes. Basically he went through each amp and replaced all parts he felt should be upgraded. I think the only circuitry changes were the penode/triode switches and adjustment to the meter on the back for correct setting of bias and AC power balance for the KT-90 tubes. They were probably 75 percent rebuilt to original status. I unfortunately lost all the transaction paperwork during a move.
Regards.
Paul