Here are the rest of the pics.

The ducting and cool-tube are 6" while the fan and filter are 8" with 6to8" reducers to connect the duct work.

Wish we would have gotten a pic of the in-line filter before we put it together. Rooster came up with the idea. We took some cuttable carbon filter sheets and secured some of them inside the reducers. Cut them to 8" so they won't blow out with the fan on. We can even add more carbon sheets (on the intake side) if needed.
Have not seen anyone try this before so we hope it will work for our needs. If we run into problems we'll let you all know.

The CFLs are not in the final locations in the pics. We just placed them in there to figure out where we wanted to mount things and do a light leak test. Thanks to Jamstigator for the idea based upon his pics. :thumbsup:
The final mounting (via hooks at the top of the cab) allows us to move them up and down and even pull the excess cord length out of the cab. We cut a hole in the top and used a gromet (plastic/rubber bottom for a chair leg) to create a gasket. No pic of it, sorry.

Did a 30 min temp test with the CFLs (about an inch under the lights) and max temp was 83 on the intake side and 86 on the other side (the right) during the hottest part of the day. Ran a room temp test over night and max/min was 86/73 so it looks like we are good. Have to do another test after we get the wiring finished and the 600W HPS bulb in, though.

Enjoy!