Hi, I installed rooExtend and rooDial a couple of days ago, I really love them so far. Today however I touched the dial and the volume raised to the point I was afraid my speakers could explode 
that was really uncomfortable. I noticed that rotating the dial by just a few degrees was enough to go through the full range of the amplifier. I checked the settings but they were actually reasonable, now I changed to 8 db per full rotation and in fact I get about 30 db difference in less than 30 degrees of rotation. Any idea where the problem could be? I am using a standard ROCK as core, the dial is on a raspberry pi 3 B+ and the pre is NAD C658. Thanks in advance