Instead of using piano wire and copper lugs, use regular control rod material (2-56 is plenty big) and electrical spade connectors that have the plastic doohickey that you crimp. Pull the plastic thing off, and the rod will fit perfectly into the place where the electrical wire normally fits. Solder the control rod into the spade terminal, which already has a small screw hole in the spade end and can be drilled to your desired screw size. the red ended terminals are perfect for 2-56 size rods, and the blue ended terminals are right for 4-40 size rods. The control rods solder more easily than piano wire, and are marginally lighter. Even though they bend easier, if you hit the tail hard enough to bend them, you're gonna break something else anyway.