I read all the reviews on this pedal before purchase and seriously considered the drybell. The lovers of the mdv 3 mentioned 1 pot to adjust for more throb,most were satisfied with the results of turning that pot clockwise but, were concerned with issues of bulb life. I have a new version and, it has three trim pots...again this unit is dated 2 26 18....so less than a month old. I had the large cream colored dv back in the late 90s and it was mind blowing. This mdv 3 has left me underwhelmed......so far...... Here are the settings of the three pots. By the way, one pot is north of the dog house and the other two are just under the doghouse. Pot 1 north of the doghouse....is labeled exp max. So expression pedal max. The two below the doghouse are sym and intense. Looking at the early photos of the mdv 3 l saw only one trim pot.....the three trim pots in my recent addition look way better from a quality standpoint. I have not touched any of the pots yet,by the way......yet.