TJ07 + PA120.3 + PA120.2 = Photos of my version of this.

[AndyM]

Option1: This is the way it's currently configured. The PA120.2 gets slightly less fresh air.
f-> PA120.3 PA120.2 ->f
f-> PA120.3 PA120.2 ->f
f-> PA120.3 PSU <-
-

Actually all the intake is on the PSU side...this way around ~1/3 of the 120.3 is getting air that didnt formerly pass through the 120.2. I'm also suspecting that some of the 120.3 is pulling air from the upper chamber as well, but havent done any 'smoke testing' to verify this as of yet.