KH602 - better POTS?


All - i have had my KH602 for a while now. i notice the volume pots don't have a "smooth" taper off when i lower volume. there is amost no change than a dramatic drop in volume in 1 place. Are there better, more liner pots suggested? the KH602 has the Active EMG Pickups. So I assume there are specialized pots for Active Pickups?  What POTs would you all recommend as an upgrade to the standard POTS?