[1] Double-stack the frame.
Double-stack a short second rod over the selected fragment with a
Universal Joint for Two Tubes and two adjacent clamps.
[2] Crosswise release.
Crosswise release is achieved by loosening the rod-clamping nut of the Universal Joint for Two Tubes
on the short rod and the rod-clamping nuts of the two adjacent Adjustable Clamps on the long rod.