@YesterdaysCoffee The tool change macros would be the way to go (tpre, tpost, and tfree).
But can you clarify something for me because I may have misunderstood what it is you are trying to do. Do you want to switch between tools as the print progresses in the manner of a tool changer or IDEX (which is relatively straight forward) or do you want to use both tools concurrently (i.e. at the same time) with each tool printing a different section of the model?. My understanding was that you wanted to do the latter which avoids tool changes but which is entirely different.