I've been using a boss ME-50B for a while and I've figured out this cool delay effect where you turn the feedback way up and then play with the rate knob with your toe, moving it around the range of about 200ms and 0ms. Now I've been looking for a while for a pedal that can get this effect by using an expression pedal. It's important that the pedal can go all the way down to 0ms. I was recommended the Time Factor and that seems to be the only pedal I can find that has that range of delay rate and has an expression port. But I can't seem to get it to do what I want. So I made a little video because I can explain what I'm hearing all day but you really just got to hear what I'm talking about. So check it out.