Hey everybody, I had a question about dod's envelope filters. I have a fx25 filter and my friend also has an fx25 filter. About a year ago I had an fx25B filter which had a third knob and was clearly a whole different model. However both mine and my friends are just called the fx25 yet they have a completely different build. Both just have 2 knobs; sensitivity and range. They are a different color green and have different style knobs etc. What is the deal here. Did dod just release another version of the same pedal and one is newer and one is older? What exactly is the difference here? Mine is on the right and my friends is on the left. I snagged the pics from ebay sales so I didnt have to take pics of both of our pedals. Thanks everybody.