Hi, i assembly my own version of kossel mini 3d printer using arduino mega and ramps 4.1, i´m using the kossel delta configuration of Johan with some adjustments and i finally make the callibration details, and it looks like its all ok, the endstops is working well finding the center of the platform and move along the surface with no concave or canvex results, but here is the problem, when i start the G29 code to begin the autocalibration secuence, the printer starts well but after the movement of turn the zprobe down, is not following the secuence and start looking for points on he platform in the air, can you help me found what is the problem of the calibration? you can see the problem in this link: https://youtu.be/YbYzFAVb4VY