I don't think you can really expand on the track or improve it on the table it is on. Do you have space to ad to the table? How much space do you have available? Can you clean up the walls of the room to allow you to build an around the walls layout on shelves where you operate the layout from inside instead of outside the table? When you use a 4 x 8 table, you can get a mainline run of about 23-24 feet maximum in an oval around the perimeter. A figur 8 with either a cross over or a crossing track will get you a few more feet. To operate that 4 x 8 table, you will need at least 2-3 feet of clearance on each of the four sides, which translates to a room of at least 8 x 12 feet or 10 x 14 feet. If we look at an around the walls shelf in that 8 x 12 foot room, you have the capability of getting single oval mainline run of 40 feet! If you want to have the layout at a height of 40 inches above the floor, you could build shelve below the layout all the way around the room except at door ways, to clear the walls for the layout. Put a draw bridge, swing bridge, or lift out bridge at any doorways to allow access to the room.