This attachment fits around the tube of the Modulus Storage Stock and prevents it from collapsing when you put any amount of force onto it. The included files reach just past the second lock point. Scale the model in your slicer to fit your preference. No supports are required.

To secure it, straighten out a paperclip (but not perfectly straight--otherwise it will fall out without glue), insert it into the assembled unit, then cut the end flush. Repeat for the other side. A paperclip with a rubber or plastic coating works better than a plain metal one.