Herbie Presence Pot Taper

[alethomantis]

Been playing around with the Herbie models today and noticed that the presence pot behaviour is a bit strange - the control seems to have almost zero effect from 0 to 8 on the dial and is very powerful from 8 to 10. Is this behaviour normal or is there maybe a problem with the taper of the virtual pot?

 

[alethomantis]

I suspect this behaviour has something to do with the cathode follower changes because I am experiencing a similar situation with other models that use a cathode follower (Cornfed, Brit models etc.)