I would like to hear your thoughts and experiences with any of the Marklin Z 2-10-0 class 42/44/50/52 Steam Locos. These would be models: 88041 88971 88972 88973 8154 8884 88842 88843 88846 88831 Along with some others. How well do these models haul? How many standard Era IV passenger coaches can they handle? What about the difference in the 3 pole vs. 5 pole motors? How about slow speed operation? How well do they work in a "double-header" situation? Any opinions, observations, and experiences would be much appreciated especially from those of you that own any of these models. I'm thinking of putting together a Nostalgie Istanbul Orient Express consist as is shown below: Thanks in advance!!