what was the earliest produced episode of the nutshack?

we know the pilot is the first released episode, but which one was the first episode to actually start production.

From what it looks like, I think Pimp my Jeepney was probably one of the first-made episodes because the mic quality sounds like it was done in the old studio (compare the voices in that episode to the ones in the pilot and then the teaser) and the tinikling and pimp yo shhh segments use the same sort of animation style present in the teaser and advertising. also cherry pie mentions phil being the man of 2006 rather than 2007 which is when the show aired.