Jet, et al... When you're right you're right! (Not that I doubted any of you...) I spent a lot of time online yesterday looking at prototype locomotives - all the modern stuff is much too long to be realistically replicated on an 8x4 or even 5x9 HO scale layout. Still, I'm just not sure I want the shelf-type design. No particular reason, just personal preference; I'd like to see my trains actually go around in a continuous circuit instead of just back-and-forth. Now my dilemna is do I want to build a larger layout or switch to N scale? I've been "starting" my layout for a year now and I haven't done anything except research! Aaarrghhh!