If you are changing the pads or rotors on your free star, the only way to compress the calipers is with a tool, I found this out the hard way too,
After 2 hrs of triyng to compress them, screw them in, etc.etc.etc, I called auto zone, theylent me the tool for free, it applies significant pressure to the caliper while screwing it back down. It took me 14 minutes to change the second set of pads, from start to finish, good luck.
