RGR Robert Grodinsky research MODEL 5

RGR Model 5

I own a Model 5 whicjh quit working = I too would like to repair, These and his Pre-amps were considered highend stereo many years ago. I think the high current design had a resurgance recently.
In addition, I am curious, because there was a Wolfgang that created a carbon frame for T-Rex called WOV., which I own [yet to be assembled]. Are you that Wolfgang?