Hello! The actuator rod is one piece. This makes me think you are selecting the bodies in fusion rather than the component. Didn't I supply dedicated STL files for the starter switch? If you haven't got them, send me a message on the website chat window and will send the file direct!
You nailed it. I was working in Fusion. I do have the dedicated STL files. I did get it printed from Fusion by using the “combine tool”. I now have all the parts printed. My Spring kit arrived today. Just need some 3mmx8 screws before I can assemble it. Should be here later in the week. Until the screws arrive I am working on my EFIS panel. Printing knobs now. Your design prints beautifully on the Ender 3 Pro using PLA. Thanks for the quick reply.