Has anyone here added a status LED to their Vox 847 wah? I recently got an 847A, and I really like it -- it seems to be built like a tank -- but I wish it had an LED to tell me when it's engaged. Can someone point me to a simple way to add one? I've been thinking the little hole on the right-hand side of the foot pedal would be a perfect place to put an LED. Wouldn't even require any drilling.