Morley EOV Optical Volume Guitar Effects Pedal Black

From the Pod FAQ here ---> http://line6.com/support/docs/DOC-2300

Q:  Which external expression pedals can I use with the POD HD500?

A:  We recommend using the Line 6 EX-1 or the Mission Engineering EP1-L6 expression pedals.  You can also use any other expression pedal containing a 10k Ohm Potentiometer.  Expression pedals allow you to change stompbox controls using your feet so you can adjust the sound while you play. On the fly, you can modify the length of your delay time, dial up the reverb mix, or change the depth of your tremolo, or anything you program the expression pedal to control on the POD HD500.

The Morley Volume pedal is not the same as an expression pedal. Guitar volume pots are generally in the region of 250K to 1M and the volume pedal would be similar.  Also, the internal wiring is different.

Morley do not see fit to publish any specs for  this pedal (that I can find at their site) but I think it is doubtful that it would work.  Where did you see the spec saying that it was?

Also, there is presently no way to calibrate external expression pedals on the POD.