Possible solution to slippery dial cord drivers

[wa2ise]

You know those tuning control-dial cord interfaces that get slippy. I had one last night, and it looked rather too polished. So I figured that a little more friction may be needed, so I used a round needle file to gently roughen the surface where the dial cord touches. This one looks like a pulley. After getting the dial cord back on, it seems to work better. I'll see how well it holds up over time.

I also changed out the rubber grommets that mount the tuning cap. The old ones let it sag too much, making some trouble for the dial cord.