I have a 3Zcorexy. I changed my bigtreetech Skr1.3 contorller board to Octopus ，my Printer_Config refer to BIGTREETECH-OCTOPUS-V1.0/BTT_OctoPus_Voron2_Config.cfg at master · bigtreetech/BIGTREETECH-OCTOPUS-V1.0 · GitHub, but the new board each layer will becoming more and more skewed (corexy’s Ymotor will walk more by itself each layer. There is no such problem in skr1.3). I have checked the belt screw. And i change XYSTEPPER mircosteps 64 to16, Ymotor getting skewed seriously.