Re: low reynolds number...
The issue is that you can't drop something from the ISS to earth.
The ISS is in orbit doing 7km/s 'sideways' if you drop something it is also doing 7km/s sideways.
Everything going 7km/s sideways is going to stay in the same orbit.
If you want it to go down you need to reduce its sideways-speed
You could just halt yourself and then fall gently (assuming you had a parachute) but to do this you need to get rid of the 7km/s. One way to do this is to have an engine capable of reaching 7km/s the other way. However a moments thought will realise that this is the same size as the rocket that it took to do the original 7km/s - which you would have to carry with you.
This is the reason for doing the spectacular "re-entry", it is to use the Earth's atmosphere to burn off that extra speed rather than carry the fuel and engines needed