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Josh,

I don't think you'll have any problem with the pot yo-yoing or
hunting. It will be very slow compared with the processing speed
of the PIC and has no significant mechanical momentum to carry
it on past a set point. The reduction gearbox means a pretty much
instant stop

Attached is what I use for a rotary pot controlled manually or
with IR. The wiper goes to an 18F, but could also go to the 12F
for feedback. It's a little slower than spec because of the voltage
drops across the transistors, but that's not too important in my
application

Might not apply to your pot, but I notice in the Penny And Giles
tech notes for the PGFM9000 series that the motor should NOT
be driven against the end stops, so you'll need to address that.
Rotary pots have a clutch

Joe

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