There isn't a way to export a multi-block txt

a tool for making the multiblock files in game would make a world of difference for this mod. You couldn't intergrade it with say world edit files or something along those lines?
I'd be willing to commission an in-game tool for this mod.

You're just meant to write the files yourself, its unlikely I'll ever make a tool for automatically exporting and creating the files due to the amount of required work versus gain, given most people have not had issues with making the files manually.