I did a search using "volume pedal design" and didn't see anything like what I'm thinking about. This idea started in a seperate thread about volume pedals, and I want to see what more people think about it.
Volume pedals are bigger that I think they need to be. We all use pedal boards and it would be great to have more space for things that are "effects".
The smallest I've seen (limiting myself to foot-controllable here, obviously the volume knob on your bass doens't take up a lot of room...) is the DOD FX-17

I think someone needs to make a volume pedal that is a stand-alone version of the volume controller on the boomerang.
I've sent the idea to a couple of people, including the Boomerang Corp. I got a response back from Boomerang, but it didn't really say if that's something that they'd be interested in making.
It should be easy to make, and I think the demand would be fairly high. I think it could be as accurate as an "Ernie Ball type" as long as the radius of the wheel is high enough. I also think it could be quite rugged if made well.
A person would want to be able to go from 0 - 10 in one motion. Using a 1.5" radius, the circumference would be about 9.5". What size shoe is that? I have about 13" to work with on my size 11 shoes.
What do you all think? Would you use something like this? Do you know of anyone who would make something like this?