should i look at those crazy high slew rate op-amps with like 600-3000V/us slew rate
>I used Linear Tech LT1358's for the input, National LM6172's around the VCA and another on the output. A that 2180A vca was used with the 47 ohm - volts rail bleed resistor removed as well as the 100k resistor off the THD trimpot. Sockets were added as well as local power supply decoupling and larger psu mains caps.