About this 3D model

Yes, another spool... but I wanted a spool that was: -open on one side (to easy changing of the filament, like this clever one http://www.thingiverse.com/thing:8317) -parallel to the x-axis (more direct move for the filament) -hanging from the top (like the http://www.thingiverse.com/thing:3962 used before) -quick and easy to mount/unmount for when carrying the reprap -and even flat transportable if possible I'm testing it right now, and it seems ok :)