Center Pit Staging Area

Nested hint: Londie gave me something called "itacha".
(sorry, cannot decode section)
Hint: There's a door behind some barrels marked Access Prohibited.

Hint: I can't get back out to the Center Pit.

Hint: What are these loud, humming machines that I keep passing?

Hint: Now that I've found some gems, how do I convert them to cash?