Actually, this is an interesting way to do them. The original springs are so closely coiled, there isn't any good way to do it, unless you have motorcycle equipment. Check the photo. He ignored the original straps and used less wide, heavier ones. The only thing wrong with this setup is, you won't be able to slooooly release the pressure, so make sure the springs are centered on the slide-in top before doing a count down and launching.