It took me at least 6 prototypes to get everything right and get this as a result - <a href="http:&#x2F;&#x2F;www.amazon.com&#x2F;dp&#x2F;B019JK8AQM" rel="nofollow">http:&#x2F;&#x2F;www.amazon.com&#x2F;dp&#x2F;B019JK8AQM</a><p>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 &quot;drill, tap, saw and file&quot; :) And I would certainly not be able to share design online or sell it.<p>There is place for these tools, and there is place for 3D printer tool.