Here is a short video of my little TICH loco on the St. Croix highline track. TICH is a popular 0-4-0 design that is usually built for 3-1/2" gauge track. This little guy is pulling 10 times its weight around the highline track. I had to push down on the boiler with a shovel to get enough traction on some of the grades. It is 30+ years old, and ran really well.