Andy: My D-12 came with an MSA volume pedal.
As best I can recall, there was a pedal rod end attached to the front of the VP and a pin for that rod end was also attacehed with a ball chain so it wouldn't get lost. When the VP rod end was placed into the pedal bar; the pin was inserted thorugh the upper hole to hold it in place. The two lower tabs were used to keep the pedal from tipping either sideways.
Also noteworthy about the MSA VP was that it used a shaft gear on the pot and notched bar to turn the gear on the movable top plate, just as the old DeArmond foot volume used but with newer technology materials.
Regards, Paul[This message was edited by Paul Graupp on 10 October 2004 at 11:41 AM.]