You can easily remove the spring on the TW shock. First, place the shock top-side-down on a floor jack; second use a tiedown strap and tightly secure the bottom of the spring (now at the top because its upside down) on both sides to the bottom of your jack; third, here is the dangerous part - hold the shock very securely straight up and have someone slowly jack up the shock; fourth, the spring retainer will come loose when the spring is tensioned - remove the retainer; fifth, release the tension on the spring from the jack. That's all it takes.