I like the design. Simple yet effective. I also like that it snaps together for assembly, has effective cable management, and allows access to things like the reset button. No active cooling though?
Heck yeah the fan is in there, that little red lid is covering it. I always have my drivers comfort in mind.
I stand corrected 
I was surprised how little airflow is required to keep.them cool (a stiff breeze would probably suffice lol) but they would melt down in minutes if relying on passive cooling!
Asho,
That support arm on the z axis is impressive. Do you have a download link for it on thingiverse. Also, how did you mount the 1x1 that holds the drag chain to the motors?
Hi Fernando,
I used cable ties, simple, cheap and works a treat!
I designed the little end stop and cable chain tower myself. I have not put it up
as I did not think anyone would be interested. But I will look into getting it uploaded
and a link posted here.
Cheers
Greg.
I have uploaded the parts to Thingiverse, the link is here :- http://www.thingiverse.com/thing:1332994
Cheers
Greg.
Asho,
Thanks much!