Us SP modelers have long had to roster a bunch of these Ulrich cars to represent the thousands of Enterprise GS gons that SP bought in the 1920s. They were truly durable, remaining in service well into the 1960s on SP. As models, the Ulrich cars are not bad, though the white metal die castings are VERY hard and all but unworkable for those wishing to add wire grab irons. I have succeeded in adding improved brake gear.