Re: DIY Bolt Knob
If you have the facilities, you may have yourself a product. If not, perhaps look around and find a machinist who could make them in quantity. A few extra bucks income for the home can't be bad. Having just built a house I noticed hundreds knobs of every style and size, but none like this. Get a production cost and try a few locally then, if all goes well, speak with some of the big catalog people (Cabela's, sportsman's guide, Bass Pro Shop?). You may have found your calling. On a flashlight forum I visit there a several people who built lights as a hobby that turned into a pretty big business. Perhaps even a product line. I think some of those folks had contacts in China who did the bulk manufacturing. Just a thought.
Good Luck.