voodo28, I haven't used s3d but am still stupid enough to talk out of my ass anyway. Found this (https://www.simplify3d.com/support/t...ple-extruders/) article on their site. Two thing I noticed: I don't see an extruder offset anywhere in their screenshots. It may be expecting the firmware to handle the fact that the nozzles are located in two different locations. Second, the skirt makes it look like the files didn't import correctly. Are you using the separate stls files instead of the amf? If so did you center the models as described in the "import and arrange" section?