FMRS lets you jump back and forth in time.
It generates save points after separating controllable probes, ship, landers, ...
So you can launch your mission into space, then jump back in time to the separation and have full control over your dropped vessels.
You can do SpaceX's Falcon 9 style launches and fly your first stage back to the launch site.
Or launch a space plane on the back of a normal plane. Bring the space plan into space and then fly the launch plane back to the runway.
Drop scientific probes out of flying planes. Let them descend to the ground and do research.
The separated vessels will be added to your main save after landing, or automatically recovered.
Raw stats are from the beginning of time until now. Each follower and download entry represents one hour of data. Uneventful hours are omitted.