Three Holer Duotone Wiring Question

[edrock]

Does anyone know if the flat top three holer Duotone's Piezo preamp buffers the magnetic signal?

I'm working with a tech to build a mag/piezo blend pedal and the answer will impact the value of the pot we need. (Erm . . . uhhh . . . no, I don't mean ditch weed vs Thai Stick)

Here's the thread of origin.

And the originator's own page on the subject.

Thanks in advance!

E