@ Ccow: We think a good value for the CLR would be perhaps 1K8 (w/most LEDs that’s very bright) while keeping the LED from blowing. Then use a 2K, 2K5, 3K or 5K trimmer to dim as much as you wish. Of course people can vary either the CLR or Trimmer values to suit there needs as long as there is enough resistance in the CLR to keep it from blowing.
I also think the fact that everything is ultimately mounted to the foot switch will make it real secure for adjusting from the outside.
If you have a clever name for this new board based on what it does that we choose I will send you some for FREE!