I built all of them flush to start with which brought on the tracks not to be extended more than enough, And so the third leaf overlapped the edge from the table by about a single centimeter. Leaving that excess inch (in the block sticking previous the tracks) will help https://lanegewng.dm-blog.com/29760524/getting-my-modern-extendable-dining-table-rectangle-sideboard-with-storage-to-work