I finnally have all the track down and the trains running and now I'm working on scenery. What is a good size for trees on an O gauge layout. I mean about how high in inches? I've seen trees on ebay pretty reasonably priced. Has anyone tried them? I've used this plant mossI've used this moss in a bag I got at the local craft storethat really looks like bushes but now I need some trees. Any thoughts?