Need help recreating shortcut for Things 3

I’m trying to recreate a Shortcut I built for automating project creation in OmniFocus in Things 3. The project followed David’s model closely, allowing me to create a project with several specific tasks with varying due dates. I am able to assign several variables during the shortcuts creation including name, place and time and the shortcut parses the rest.

I’d like to create the same shortcut that utilizes Things 3 but I am not very practiced at URL schemes.

Any help would be great.

The original shortcut:

If you haven’t already I’d recommend checking their URL scheme builder:

One thing you will need to do is adjust the date variables I think, I know it can do natural language parsing but I don’t know if it can do -X days.