A true Tone pot has no connection between the resistive element and the Clockwise terminal. This was intended to prevent the tone capacitor from bleeding of high frequecies unless it was rolled back a bit from full-CW.

That type of pot must be very hard to find these days, but if you had one, you might be able to do that trick with it. Gotta think on that for a while, and now is not the best time of day for thinking clearly.