For All Mankind Pathfinder nuclear shuttle replica by Jojos, heavily upgraded with new NERVA exhaust, new wings and fuselage shape, custom cargo bay doors, new NERVA and OMS, VTOL capability for low-gravity or low pressure bodies like Moon or Mars, and SABRE-like engines, making it a bit more realistic, adding ability to refuel while flying in the atmosphere (fuel "extraction" rate depends on speed, air pressure, drag, and Throttle slider, and will work as long as you're in the atmosphere).
As I said it is possible to refuel this shuttle by "diving" into the atmosphere of the planet for short periods of time, but be careful, to refuel it, you need to have some speed, and it's pretty easy to spend too much fuel, to not be able to return back to orbit.
With this abilities Pathfinder can easily deliver ~100t of cargo basically anywhere, but you'll need to make a crane to unload it

Without heavy cargo Pathfinder is able to get to the moon surface and back without refueling.

To launch from carrier aircraft turn on AG 3 (jet engines), and keep it on all the way to Karman line to get fuel from atmosphere. You can launch basically on any altitude, you can even remove carrier aircraft, but I recommend to climb up to +-10 kilometers before launch

Cargo bay doors are semi-automatic. Once on orbit or surface set Brake to 1 to open the doors. Set Brake to 0 to close doors.
They will close automatically if periapsis is below Karman line. Brake input is still used for airbrakes, so keep this in mind.

Landing gears are also automatic. Carrier landing gears will retract after 30m AGL, and won't deploy anymore, and Pathfinders gears will retract/deploy at around 700m AGL on any planet.

VTOL engines are powerful enough even for vertical landing on Droo with 100t payload, but you need to keep in mind that you'll have low TWR.

Also I highly recommend to dump excessive fuel before landing on runway

Control surfaces on Pathfinder are automatic (they turn on only in the atmosphere), and you can control both body flap and carriers flaps by Slider 1

Custom RCS can be found HERE.

P.S.

P.P.S.

I will really happy to see other spaceplanes with my SABRE (there're just 4 jets, couple of fuel cells under the cargo bay, and a pretty simple program). As I know it's the first proper attempt on making working SABRE
One fuel cell generates Hydrolox while SABRE is active, other two "transforms" Hydrolox to Jet fuel

P.P.P.S.

Some people (even outside of Juno fandom) argued with me that it was never mentioned in FMK that Pathfinder had VTOL engines, but it was directly said in the series that Pathfinder was designed for Mars landing, and it even brought first ever probe to the surface. And that's not to mention that Sojourner spacecraft from Season 3 was designed as temporary replacement for Pathfinder fleet