Ask HN: What is your money-making side project outside programming?
Breville coffee grinders are impossible to get internal parts for. I designed a 3D printed upgrade for the main wear-part in their BCG800XL and BCG600SIL Grinders.<p>The storefront is through ShapeWays[1] and I use iFixit[2],[3] to drive the traffic. It passively makes enough to cover my own coffee needs forever. I spend about 20 minutes per month fielding questions. This all happened because my grinder failed and I could not get parts.<p>[1] <a href="https://www.shapeways.com/product/NASLAGCCP/breville-coffee-grinder-impeller-upgrade" rel="nofollow">https://www.shapeways.com/product/NASLAGCCP/breville-coffee-...</a><p>[2] <a href="https://www.ifixit.com/Guide/BCG800XL+Grinder+Jamming+due+to+Worn+Impeller/62905" rel="nofollow">https://www.ifixit.com/Guide/BCG800XL+Grinder+Jamming+due+to...</a><p>[3] <a href="https://www.ifixit.com/Guide/BCG600SIL+Dose+Control+Pro+Coffee+Grinder+-+Jamming+due+to+Worn+Impeller/96493" rel="nofollow">https://www.ifixit.com/Guide/BCG600SIL+Dose+Control+Pro+Coff...</a>