Step 3Tubework
In this step we will be creating a small rectangular opening in the tube. This will allow the user access to the pin screw.
More filing:
Begin filing away at a section of the tube; once you get about halfway through begin filing sideways creating the rectangular opening. You will just have to guess how ling it has to be because it will vary depending on the size of your mechanism, so compensate for this. Place the mechanism (bolt thing) inside the tube once you are happy with your cut-away and put the screw back on the mechanism. Make sure that the mechanism can move up and down happily, and then you're done!
Mechanism:
Once you are happy to guess how much to the mechanism you need hanging out the tube, cut the remaining thread leaving about a cm to connect the cam to.
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