Mixy,
After using Scarm for a while now, I see one minor flaw, at least in the O scale area. A lot of track plans I help work on and view on the forum require custom cut pieces. If I am designing a track plan using Lionel tubular track, in order to create a custom cut section, I have to go to the AtlasO 3r and select the 40" flex track piece to fill the gap.
Could a new piece of track be created for other manufacturer's track that has the properties of the AtlasO 3r 40" Flex, maybe called Custom Cut?