Noise after installing new lowering springs/struts Options

[doctavic]

Hi guys,
Last month, I installed new TRD lowering springs and KYB struts all around. After I installed them, I started getting these awful noises from the rear. After searching 6gc, I installed new Energy Suspension polyurethane sway bar bushings and KYB strut mounts. Noise is still there, like the spring is loose (which they are when I jack up the car). The end links seem tight. I even took it to a mechanic, and they said nothing was loose or installed wrong. So, could my end links be bad, even though they are tight? Is it just something that might go away after the springs settle in (how long will it take for them to settle in)? Any suggestions welcomed.