I've got a 16 X 6 1/2' heavy wooden garage door balanced by two torsion springs on a common torsion bar. One spring broke, I replaced it with an exact replacement from a professional garage door distributor. I torqued the new spring until the door raised and lowered with minimum effort and remains open in the "up" position. However in the closed position, one side of the door has about 1/2" clearance when the other side is touching the floor. I think I have an uneven distribution on the torsion springs. What is the proper method of properly balancing the springs when one id old and the other new? Do I remove torque from both and then tighten the same number of turns on both? If so, how do I test to make sure I have the proper torque needed to assist my Craftsman 1/2 HP garage door opener? Any additional hints are welcome.