Where do you get liquid nitrogen? What does one store it in. I need some. I'm curious how that affects the spring steel. Have you had any springs fail prematurely? Maybe a brittle fracture? I'm curious now.I put the springs in liquid nitrogen then wait until they shrink down to about 12" and then drop them place. I leave both ball joints in place and only have to make sure the spring is in place as it expands.....![]()