His labor of love was the coal tower. It is a cathedral to detail work.
He found a picture of the Pennsylvania coal tower online complete with the dimensions, so again, all he had to do was shrink it to scale.
Instead of a solid storefront, the tower is made of wood beams, stairs and coal shoots that open with pulleys and stairs.
It is 84 feet tall in real life and has stairs leading to the stop that Pauli duplicated.
‘‘All the parts and pieces that had to be cut to make this one,’’ he said reflectively.
There is a switch tower that was the first building in which he put interior details. The clock on the wall reads 3:10 in homage to the movie ‘‘3:10 to Yuma,’’ and has a tiny calendar turned to August 1952.
Pauli approached the contractor who was working on the Hamilton Street Bridge last year and asked for the state-crest medallions for his garden train.
The contractor got permission from state officials and gave Pauli two crests, the largest of which is 8 inches. One medallion is on a bridge abutment and the other is on a cliff wall.
There is more work to be done on the set, even after the bricks are installed, Pauli said.
‘‘It’s like any hobby,’’ he said. ‘‘You can always add detail.’’