I'm putting on a set of H&R springs on my 02 WRX. The front looks fairly straight forward. On the rear, do I need to remove the rear seats to access the retaing bolts for the top of the struts or can I access them from the bottom. Also, I've never removed struts before, just springs and shocks; do I need to put compressors on them before I remove any bolts? At full droop, are they under any compression?