Standard CC2 modifications: replaced the coupling caps, reduced the preamp supply filtering, and modified the preamp so it's more like the 60's AC30s - this includes adjusting the preamp attenuation and compensating the gain of the solid state circuitry. I also added a solid-state circuitry bypass switch in the "smoothing" switch location and a boost switch in place of the "bias" switch.
Finally, I threw in a set of NOS tubes including a GE 5AR4.