Thanks Jason!
I downloaded the SRD last night and read through it not expecting to run anything with it.
Then my usual game just wasn't working this afternoon, so I stopped it and pivoted to using 2400. Without picking the SRD itself back up again, I was able to run a 4 hour game completely off the cuff.
24XX has now been adapted to the present day where the FBI's Crimes against Children Unit caught a serial killer this afternoon. Bought the collection just now. Thanks again.