Pansies, the both of you. Observe:
In all seriousness, I really like what I see of your implementation, Brandon. Would it be possible to get some shots of the internal arrangement?
DrCR: From what I understand from your drawings, revision 4 strikes me as a bit bizzare. What good reason do you have for putting 2 rads perpendicular to your airflow where practically no air will be passing through them? And is this for a multiple loop system? If not, why are you bothering with all the rads? Reduce the number and increase the size if you must, or you'll likely have pressure drop issues to deal with. Running that many rads in series honestly isnt going to get you much (if any) performance gain.
Anyway, I havent posted here in a while, so its nice to be back.