Do you slow roll this along the bottom or experiment with various retrieve speeds?

C-rigs are a boring slow dragging presentation. Just keeping in contact with the bottom determines how fast you can retreive, the weight needs to keep in contact with the bottom structure. I like to use as light a weight as possible to help prevent snagging rocky bottom structure where I fish and tend to use light line finesse presentations more often than standard  baitcasting that require heavier weights. Sonar is part of this presentation, knowing what is under the boat, the depth the bass are at is critical. I often meter the bass before catching them.

I taught my son to fish a slip shot rig when he was 6 years old dragging the rig behind my boat when I was jig fishing, I fish jigs slowly. 30 years later he still likes to use his finesse split rig because he catches bass consistantly, often kicks my butt doing it. C-rigs aren't my favorite presentation, when you need to catch bass it's hard to beat.

Tom