I found a solution to my previous problem of not being able to put the dvd drive back into the xbox after I installed a new hsf on the gpu.  I decided to mount the dvd drive onto the top of the enclosure, along with another 100mm fan.  It isn't very portable anymore, but it works for me.
In this post I will show how to mount the dvd drive on top of the enclosure, add a 100mm slim fan, and change the 12v stock fans on the 360 from variable to constant power.
In this post I will show how to mount the dvd drive on top of the enclosure, add a 100mm slim fan, and change the 12v stock fans on the 360 from variable to constant power.