Hi everyone, I don't know if this is the right place, I apologize in advance. My name is Orazio and I am a happy owner of Roland Bk9. I found myself in this forum because recently a Bk9 slider doesn't work well, it doesn't reach the maximum volume of 127. After several attempts with contact cleaning spray I managed to get to 125. Browsing online I found a very interesting tutorial on where to find the potentiometer and how it should be replaced; I want to compliment the person who posted the tutorial. For the moment I don't think I will replace the slider, because it is the second one from the left, the one that regulates the volume of the bass track. If the problem gets worse I will know what to do. I wonder how many of you Bk9 owners have had the same problem. I thank the forum administrator who allowed me to join this community. Thanks from Orazio.