Im trying to create the layout below in a 9x5 space with fastrack. I did it before... but unknowingly had O31 mixed with O36... Im trying to create it using strictly O36. I know I will need plenty of 1 3/4" and 1 3/8" pieces to make it work as well as some 4.5 and 5" any help would be great. Unable to use Scarm myself as I have a MAC