On my 2013, I am doing front pads and rotors. I disconnected the 12v before starting. Now, I'm ready to compress the caliber pistons but wondering about what to do next. If I just compress the pistons. I will force dirty fluid back through the system which I've heard can mess up the actuator. If I open the bleed screw, air might get in and then require system bleeding, including Techstream which I dont currently have. Any suggestions are appreciated.