After removing my Xbox insides to clean it out I’ve forgotten to put back 2 out of 8 screws...

As you've taken your console apart we can't help i'm afraid.

Eject Disc . then Unplug Power to CONSOLE, now go clean disc with warm water and a soft tissue, wipe from inside to out, then wait 2 min, and plug power back in ,, TURN ON and SIGN IN , then put disc in and see if it works, also you can try to
UNINSTALL GAME, then RESTART CONSOLE, after that do a FRESH INSTALL of game , after that test out

I received a custom Series C controller as a gift. It is out of warranty and just recently developed a nasty thumb stick drift. Microsoft zero help. Can this be repaired?

If you have a screw driver you need to remove your xbox controller and then clean where the stick drift is then put it back together and you have it fixed.

Re move the headset cushioning you’ll see six screws take them out. Then you Can see another four and then remove that cover the battery is stuck to it unplug the battery pack the n plug back in it will charge in work fine for some reason there’s a communication error with a chip it’s like it get static charge and it just stops working I’ve had to unplug my three times and put it back in for it to work properly

Yea even a hard reset doesn't fix the problem and I know it's not the disk drive because eventually it will read but I am so tired of putting the disk in then taking it out cleaning it. Reseting the xbox putting in the disk taking it out putting it back
in doing a hard reset. Hoping it works taking the disk out and putting it back in. It takes me 8 tries for fifa to work and 6 for Titan fall