Keekster,
I see that you plan to use cassettes four feet long. This implies a loco and three carriages, or four short ones. You may as well limit your platforms to this length if this helps the design. Also you may need more width to slide your cassettes around, unless you plan to lift them right out every time.
If you want to view your locos on shed, would it not be better to have only one single road shed and some outside storage and servicing facilities. As I see you plan a turntable, I presume this will be a steam age layout, so you will need sidings for coaling and ashing out. You could save space by using only small tender types and tank engines and do away with the TT.
Colombo
I see that you plan to use cassettes four feet long. This implies a loco and three carriages, or four short ones. You may as well limit your platforms to this length if this helps the design. Also you may need more width to slide your cassettes around, unless you plan to lift them right out every time.
If you want to view your locos on shed, would it not be better to have only one single road shed and some outside storage and servicing facilities. As I see you plan a turntable, I presume this will be a steam age layout, so you will need sidings for coaling and ashing out. You could save space by using only small tender types and tank engines and do away with the TT.
Colombo