Outdoor to Indoor setup changes
 

What generic setup changes need to be made when switching from astro outdoor racing to low grip slippery indoor?

That very much depends on how good your astro setup is, generally though soften it all round springs and oil.

Changes I find that make the biggest improvement regardless of oils/springs

-shorten rear wheelbase to shortest setting to get more weight over rear tyres.
-remove any rear roll bars
-increase rear toe in
-lengthen rear camber link.

Toe in and wheelbase have biggest effect imo

You don't wanna soften springs and oil..... The man made jumps make it very sharp bumps and landings if anything you need to go up in oil. Remember you have high grip carpet too so softening makes the car unstable on there.
It's roll centres you need to change and things like rear toe ect and if you have the adjustability, chassis flex

There is no mention of Jumps or high grip carpet he just said low grip slippery indoor

And that's still not what you do. Common misconception