Took mine all apart this weekend and installed some lowering springs onto the SS struts... This time, I hand tightened the upper nut (on the fronts) to hold the strut in place. Buttoned everything else up. THEN I put the car back on the ground, took that nut off, and tightened the spring perch retaining nut (which holds the spring on), put the upper strut retainer back on, and torqued the upper nut down. No problems, no noise. Got an alignment yesterday, and I am SOOO happy!