Photos of my fusebox/relay/circuit breaker area-Have some questions on mods, updates

[DeloreanJoshQ]

Photos of my fusebox/relay/circuit breaker area
I have some questions on mods, updates, etc.
My car runs fine. I haven't really looked in-depth into the fusebox area so I took some pics and would appreciate any feedback, comments,and suggestions...

I have some questions for each photo....

Photo #1

-Why is there an empty socket three over from the bottom left(Interior lamp delay unit)? Anyone know why this would be missing? There are LED courtesy lights installed above the interior mirror and below the rear glass....
-Why is there an "X" marked 4 over from the top left(Lambda relay)?
-Do all of the relays look updated in this photo?

Photo #2

-The two circuit breakers in the middle bottom...the one on the left looks like it has been modified with the ring terminals(cooling fan breaker), the one on the right(blower fan breaker) hasn't. Should I update it as well? Is the blower motor breaker supposed to be 30AMP?
-Except for Fuse #7, which looks like it melted and has been replaced by a fuse extender, does the rest of the fusebox look ok?
-Fuse #5 is 10 AMP, but I think it should be 20 AMP, correct? Any known reason why? I know that LEDs have been installed in the dash to replace nearly all of the other bulbs...
-Does everything else look ok in this photo?

Photo #3

-What is the white empty relay socket for?
-Is the black relay the RPM relay? Is it an "updated relay"?
-Does everything else look ok in this photo?

Photo #4

-What is the circuit breaker between the two Zilla boxes (brown and red wires)? Is it the door lock breaker?
-Where are the main and accessory relays?
-Does everything else look ok in this photo?

Any other comments or suggestions?

Thanks everyone!

Josh Q