Can you buy the type of spring clamps that let the springs open up a little, but keeps them straight? Any body here take spring clamps off of the rear of their spring pack?
The square section of the carriage bolt head is large enough to wedge inside the existing square hole so that it doesn't rotate when tightening the locknut (nylock). The "rubber tubing" is actually some stiff plastice tubing, similar to washing machine hose.