Many changes from the original KOT actually.
- No Distorsion clipping diodes. Vref to OD Diodes
- The high gain mod is 100k from gain 2 to gain 3 and 100k coming from Gain 1 (instead of 10K).
- Turbo mode (even higher gain) only on the POT is 5k after gain instead of 10k. Actually it's 2 10k...