Smooth Curves with the elevated catwalks? Check
Lefferts Blvd to 111th Street
1st Curve after 80th Street before the portal to Grant Avenue
2nd Curve after 80th Street before the portal to Grant Avenue
Now it is time to work on the Rockaway switches, which are no where to be found right now lmao. This was the original layout of Liberty Avenue before the Rockaway Branch was added.
Lefferts to 80th Street is about 75% complete, with only Rockaway switches and the platform objects (garbage bins, benches, platform signage) at each station needing to be placed. Then it would be time to complete the underground section, Grant and Euclid.