I have bought both the blTouch and Mini IR and have not managed to get either one working. I'll tell you what I've done so far and where I am at right now. The blTouch uses 5 wires, 3 to the servos, 2 to the endstop. I have installed pins so that I can use the servos that were missing pins. There are 4 +, -, and S pins. In order to supply powers to these pins, I have shorted out the 5v and VCC pins that were near. After that, I messed around with the firmware and never did get the bltouch working. Now I've reset the firmware on my printer by uploading the latest version of Marlin and overwriting the configuration.h with the Robo 3D R1+ example supplied by Marlin. Then I bought the mini IR and receive it today. It only comes with 3 wires. Since the endstop pins only contain 2, I hooked them up to the 3 servo pins instead-but when I power the printer on, the Mini IR red light just constantly flickers and nothing else happens. It doesn't look like there is much to change in the firmware for the Mini IR, but since I'm not using the endstop pins, should I need to tell the Firmware to use the Servo pins instead? I don't know enough about this subject. I know I'm doing something wrong to fail at installing both of these devices, any ideas?