I am trying to remove the 600# spring from the DHX coil to replace it with a 500# spring, but the spring is so long that I can't remove the retainer. I need to compress the spring a bit to shorten it enough to remove it, but compressing a 600# spring by hand seems impossible. Any thoughts on how to get this puppy off. The spring has at least 1 more coil than the 500#...it's freakin' long.