DeMarco said they made a longer version of the FLCL 2 and 3 behind-the-scenes featurette with the voice actors that they couldn't play on TV due to time limits, so they uploaded it to Youtube. I do not remember if this was linked here but here it is. Things you won't see in the shorter edit Kari talking more about Haruko's importance to her, and Steve Blum elaborating on his experiences in this show (as well as a peek of his character speaking).
Kari gets a tad emotional at the end too. Love it.
One thing I don't get is why Steve Blum says "there are no anime dub work in California" which is totally false and could just be a case of him not thinking clearly when doing unscripted in-the-moment interviews.