I still haven't had time to bolt them on and see if I need to modify the file at all, but my first impression is that are good to go.
I had a long discussion with a coworker yesterday about how to finish them. He mentioned coating it with plastic epoxy and I think Smooth-On makes a product for coating 3D printed parts, but I'm not sure how durable /flexible it it. Eventually, our conversation evolved into different ways I could produce small batches of these (3D printing or CNCing a mold and casting with urethane; making a mold from the 3D printed part and casting with urethane; using one of our high-quality but cheap chinese suppliers to urethane mold batches of parts based on my CAD files). Even if there is the demand, I just don't know if I want to invest that much time/money into this project, just to make a small profit (definitely not enough to cover my time, if I'm looking at it that way).
My other idea is to just release the CAD files for free and have an option to send me a donation to help cover my expenses. I also want to provide people with a list of options for where they can get the file printed.
What printer are you using? What's the max build volume?