OK if you have a Mod / part that has not been updated to fit in the New Career mode , but shows up fine in the Sandbox, then what is needed is a simple update to the CFG file of the missing part .. for it to show up in the Career mode It NEEDS the line "TechRequired =" // --- editor parameters --- TechRequired = unmannedTech As you can see I put it in with the UnmannedTech catagory This is all to make it work in Career mode ... A simple Fix ... though the owners update is always the best option