Pick up some cheap wooden clothes pins at the dollar store. The two piece type with center spring. Take them apart and use each piece as a wedge.
Bend your springs back and forth, and side to side, inserting a wedge as each opening presents itself. If you can remove the springs and work on a table or bench it is much easier. A second pair of hands helps also. You only need a couple of inches of lengthening to make it work. Once reinstalled just extend the jacks and the wedges will fall out.