This looks really cool.
I'd love to get into O narrow gauge but coming from O standard gauge I expect steam engines to make smoke (and, of course, sound). I've never seen an On30 model engine that has a smoke unit. Has anybody ever seen that? There are HO models that have smoke units so I don't see why one couldn't put a smoke unit in an On30 locomotive (should have even more room, right?). But I've never seen it done. Otherwise I'd gladly get a Bachmann On30 to start out.