I have an existing flow but now have addtitional data that needs to be merged into the middle of the flow. How can I do this without having to copy all the steps by hand? I need kind of an "insert element here..." step.
You can modify the inputs and outputs of any recipe in the Flow (by going to the Inputs/Outputs tab of this recipe), which allows you to replug parts of the flow elsewhere when needed. So you should be able to create your new joined dataset, and replug it to the rest of your Flow