I know I have multiple Japanese learning textbooks, and sometimes need the same thing explained in more than one way. Different textbooks explain the same concept in different ways, but it’s not always clear where the same grammar point would be in another text. So I thought about building a simple grammar crosswalk spreadsheet. I’m unaware of a similar resource, but I don’t want to re-create the wheel if it’s already out there.
I put together the framework and have started to fill it out. It is by no means perfect, but if anyone wants to contribute or finds this idea useful, check out the google doc linked below!