Hello,   first of all, yes i read tons of  articles about this and tried the solutions. i design with openscad then slice with cura 3.6.0, save it on an sd card and finally print with the TEVO black widow.   the problem is every now and then i get a layer shift. thirst i tried all the sollutions, but the i started to experiment. - when i start the same print again i get the same layer shift at exactly the same location and the same shift. - when i slice ag