corner clamps

thingiverse

Make your corner clamp ready. Then, insert a spring of the right size between the black and red pieces. The spring should fit snugly in place. The dimensions of the spring are as follows: Diameter outside: 12 millimeters Diameter inside: 9 millimeters Length: 54 millimeters Update: If you're working with an extender made of green material, use it to attach a piece that's thin and delicate.