I pulled open the bottom of my DOD flanger a few months back and noticed 3 trimpots on the underside of the board. Today I decided to tweak. One seemed to control depth, one the gain (maybe?? it was hard to be certain), but the third I'm pretty confident was the delay time setting. Here's what happened: http://soundclick.com/share?songid=7536207 I don't think I am a flanger guy, but these noises were all kinds of neato. I think there may be similar trimmers on the FX72. Feel free to tell me what they actually control.