This new design saves filament, printing time, it is more beautiful and serves multiple types of spools.
Pipe diameters included are: 20mm, 25mm, 32mm, ¾", 1" and 1¼ ". If you want a different size do not hesitate to let me know.
25% infill with 0.3 resolution is enough for a good finish and optimize time.
You will also need:
4x Screw M3x25
4x Nut M3
1x PVC pipe 100 long (pipe diameter depends of your choice)
2x Spool Hub (I used these: http://www.thingiverse.com/thing:735213, but you can use some better for your case)