Create custom sheets in Plan section

The brainstorming sheet is cool - but I’d like to be able to build out custom sheets/plugins in the Plot module so that I can recreate worksheets I use for story building inside Opus e.g. I tend to work through John Truby’s book and end up creating worksheets for things like Premise Development, Moral argument etc… It would be awesome to be able to set these up. Or, just be able to add additional sections to the Brainstorm module (and save as a reusable version)