If you back up the layouts, and import them, they should work. I, too, have not tested this, due to my "default" layout being over-written wihen i went from b1 to b2 (due to my not backing up), but considering how Corey has it so that the layouts are saved seperately from actual tournaments, I don't see why they wouldn't work. Only thing I know for sure not to be backwards compatable is the actual tourney files.