Not all the class D5 2-8-0s rebuilt with new boilers also received new cylinders. A handful retained their tandem compound layout till the end. These engines suffered from the same weight distribution problem and caused the same headaches. However their newly-acquired  superheaters seem to have done them a world of good, and the D5Bs found a niche as banking engines on Rovniebera Bank. One was also tried out on the Kannohpio-Arnogcjo incline but somehow failed to impress. Thus it was that the D5Bs persisted well into the 1930s, far outliving their simple and unrebuilt cousins. One black mark against the class was the accident involving no. D5B.05, which ran away while returning down the gradient from Tereçko and ended up demolishing a farmhouse and numerous outbuildings, luckily without causing injury, except, it is said, to a solitary cow which had refused that morning to go out to pasture.