New to this group and also constructing my first O gauge layout. I'd appreciate any feedback on the attached plan which is based on a John Armstrong Schuykill Division Plan. The dimensions are roughly 50' long. The blue shaded boxes are things that I need access to in the basement (furnace and on demand water heater for when they need to be replaced. There is a lot of elevation change which I haven't added to the plan yet, Going with Ross switches and track with Gargraves for the transition pieces. Thanks in advance for any feedback.