Stick with being open source and post the STL on http://www.thingiverse.com/ or https://www.youmagine.com/ or https://www.myminifactory.com/ or even here. Even if you did post the STL I am sure you could still get some sales but you would be sticking with the x-carves spirit.
Now don’t get me wrong this is a very sexy looking dust shoe and I am sure you have spent a lot of time developing this and that should be worth something. One thing you should keep in mind is your target buyers. I can’t speak for all but I have an x-carve strictly because it was the cheapest large CNC router available.