So the OpenSCAD enclosures just weren't working out any more. I needed the air unit to be resized for the GPS to fit inside but no matter what I did- I just couldn't work with the model the way I wanted.  

I found this tutorial from Noe at Adafruit and followed it to the letter (round and round for several hours as I made a couple dumb mistakes but in the end- I have a new air unit! Noe (and Pedro) you = AWESOME 

The model is completely parametric with user generated dimensions so I can quickly scale/change anything I wish!

The project files are in my Git Repo and now I have a project box I can quickly use for any project forever!  I just scale the dimensions as needed and do any holes with a quick sketch.  So cool.  I should not have put off trying Fusion360 for so long but as always- I needed a goal/project to push me to do it and learn it fairly well.  

In to Cura: 

And out to the printer (i3 again)

And this is what I am left with :) 

I couldn't be happier with how things are coming along.  Now I need to work with the code some more.  I still have the watchdog resets happening periodically., SD card issue of some form and would like to add some more display functionality. Also I need to start on the ground unit enclosure/PCB assembly.  So far, so good!