I searched & came up dry- does anyone here use a volume pedal w/an upright? My 3/4 has a Radio Shack piezo into a K&K Pure pre into a CXC-110. This sounds nice, but I think it actually sounds better WITHOUT the preamp(!) I'd just bypass it, but I want to have some sort of volume control handy- I'm playing in church, where we are plagued w/sound problems(feedback, etc.).