 13.Before the rotating cam...  13.Before the rotating cam can be designed, the rest of the necessary measurements are taken so everything can be planned before the major pieces are built. | 
14. |  15.Aaron decides that the...  15.Aaron decides that the 'bags need to be placed first so that he can get accurate measurements for the final cam and sleeve placement. So he cuts out the 'bag mount using 3/16-inch plate. |
 16.The rest of the 'bag mount...  16.The rest of the 'bag mount prepping is taken care of, including drilling the mounting holes and grinding in some personality to the once-square plate. | 
17. |  18.Before the 'bag mount is...  18.Before the 'bag mount is welded in, it is double-checked to ensue it's level. |
 19.The mount gets tacked in...  19.The mount gets tacked in place, checked one more time, and then is fully welded. |  20.The 'bags are bolted into...  20.The 'bags are bolted into place and ready to see some action. |  21.The bottom 'bag mount is...  21.The bottom 'bag mount is built and welded together. |
22. |  23.After the mount is built,...  23.After the mount is built, it's bolted to the 'bags. |  24.Now we can get back to...  24.Now we can get back to the fun stuff and work on the rotating cam. The mounts are cut from 1/2-inch to ensure strength, and also because it looks pretty beefy. |
 25.The "big daddy" is used...  25.The "big daddy" is used to drill the center hole in the sleeve mounts. |  26.Here's the trick to the...  26.Here's the trick to the system: This mount will hold the cam, but the cam will be able to rotate to push the arms up and down. |  27.Next, the cam's plates...  27.Next, the cam's plates are measured, cut, drilled out, and shaped to match the rest of the spiked theme throughout the frame. |