Pear effector - v2

This effector were inspired by Kirill91's one (http://www.thingiverse.com/thing:1569106), designed for E3D-V6.
I wanted one for E3D-V5 (and E3D-V5 clones), and this is an improved version of http://www.thingiverse.com/thing:2208759.

Pay attention: I used small axial fan (http://tinyurl.com/l3kpx46), 25mm X 25mm X 10mm.
I also used some magnets (4mm diameter per 3mm height, from www.supermagnete.it) to join diffuser ("diffusore") with base. This greatly simplify assembly and disassembly with