It took me at least 6 prototypes to get everything right and get this as a result - http://www.amazon.com/dp/B019JK8AQM http://www.amazon.com/dp/B019JK8AQM And

It took me at least 6 prototypes to get everything right and get this as a result - http://www.amazon.com/dp/B019JK8AQM http://www.amazon.com/dp/B019JK8AQM And by prototype I am not saying just slightly different positions of pieces, but rather different designs. I would be dead tired at the time i am working on 3rd prototype using "drill, tap, saw and file" :) And I would certainly not be able to share design online or sell it. There is place for these tools, and there is place for 3D printer tool.