Get inside the pot and run an resistor of 10 percent of track ohmage to the
mid point, submm hole through the paxolin to anchor or use SMD and silver
paint to bridge the gap to the track, not true log track but good enough for
most porpoises for totary or slider pots. Now log wire-wound ones are more
fun, tapered formers and change of wire midstream

I got potentiometers with center tap at http://www.bitechnologies.com/

73

Tony