With the 6019 notches lined up, if you screw down the ends of the adjoining track, it will hold it tight. For my milkstand, I took a hamer and smashed the tabs flat. Nothing sacred about doing it the Lionel way. I first used it with fastrack, then reverted to tubular. With the track installed, on both adjoining track ends, I screwed them to the table. Holds it tight and flat. It also holds the milkstand in alignment.
One other thing, is the door on you 3472 low? Looking closely at the picture of your 3472, the door frame looks lower than normal. Usually the top of the door frame is all the way up to the top of the ridge or a smaller gap. There looks to be a 1/8"-3/15" gap on yours. Take a look at various 3472 pictures on google, the ones with plastic doors. Toy tolerances are always fun to work with.
