The curved ones do not stick out at all, but since they are taller that movable deflector-thingy behind the sieves (drawing a blank on what that's called ><) needs to be adjusted. The new bats come with a template to show where to drill new holes for the latches to lift the deflector so it clears the bats.
Sorry my explanation is so obtuse, but the ol' noggin seems to be running at half power right now.