I made a bit more progress porting aerotools to the Aquaero 5 over the past week and thus far can read the temperature sensors and fan stats (RPM, duty cycle, VRM temperature and current). I haven't yet figured out how to get to the device names or some of the other sensor stats (that I don't yet have myself).
If there are any Aquaero 5 owners out there who are interested in a Linux utility like aerotools,
check out this thread, and hit me up on the overclock.net forums, I could use your help.
Here are a few pics of the radiator modules attached to be rack in better lighting:
And here is a closeup of the Aquaero 5XT controller. The face plate plastic cover is removed and there is a fan installed further back on the shelf: