I've been trying to fine tune the nozzle offsets so that the output from each is perfectly aligned. I've been using the traffic cone which shows any misalignment nicely. The exact offsets can be entered into S3D but the print ignores them and comes out the same every time. I tried adding a pre-print script to OctoPrint to no avail. I think the script generated by S3D overrides it because it runs later. Looking at the GCODE there is a M218 T1 X38 Y0 command but it doesn't match the settings entered in S3D (it should be M218 T1 X38.4 Y0.3) . I'm guessing that it is a simple default setting because it is what it would be if everything was perfect. If I hack the file to have the right setting the print works. Any suggestions for how to get S3D to add the right settings to the GODE file? I'm using the S3D profiles posted by Alex on GitHub which usually work fine.