In a one-storey house, do I still need to keep 'Main Floor' under 'Model' or can it be placed under 'Floor Plans'? Or should I copy 'Main Floor' from 'Model' to 'Floor Plans' and rename it 'Floor Plan'? Would any changes I make to 'Floor Plan' be reflected/updated in 'Main Floor'? And to create an 'electrical plan' should I copy 'Main Floor' from 'Model' to 'Floor Plans' and rename it 'Electrical Plan'? Same questions for roof plan and slab interface plan. I am confused and don't get the concept of 'Model' and 'Main Floor'.