The Daystar fits on top of the shock/spring assembly. You do not have to disassemble the spring, and no spring compressors are required. If you don't have XREAS it's a pretty simple install. With XREAS it's a bit more complicated because the fluid lines restrict how far you can move the shock assembly, but it's still pretty straightforward. A proper sized ratcheting box-end wrench will greatly speed up removal and install of the three nuts on top of the shock.