Hi_br_I just purchased TWO BLTouch (the basic unit). I have tried to use them with Lerdge K and Z boards. I tested with THREE boards._br__br_In all cases when powered up the probe would extend twice and then just glow red, not blue._br__br_I have wasted a whole day trying to get these working together._br__br_What fault finding procedure can you provide? Lerdge have helped during the day, but they seem very confident after all tests that is not their boards._br__br_I hope i just dont end up a cusotmer in the middle of 2 suppliers saying is not their equipment. :(:(