I created all of them flush to start with which brought about the tracks not to be very long sufficient, And so the 3rd leaf overlapped the edge on the table by about just one centimeter. Leaving that extra inch (in the block sticking past the tracks) will help you https://finnaytng.dekaronwiki.com/932159/the_basic_principles_of_modern_extendable_dining_table_rectangle_sideboard_with_storage