What are some of the recommendations you all have for a three level HO layout
When you say 3 level, do you mean two scenicked levels plus one lower staging level? Or do you mean 3 scenicked, operating levels? And also, how big is your room? How much separation do you want between levels? How high do you want your highest level? How low do you want the lowest one? Do you want to use a helix or a nolix? If you are using a helix, how big will the radius be/how many revolutions/how steep a grade? If you are using a nolix, how much running space do you have to gain the elevation change between levels? Will the grades needed be appropriate for your protoype? What kind of power do you plan on using? Do you want helper services? What kind of cars/how many cars will a typical train be? These are all questions that you need to ask yourself before asking us.