Lewihe Play 3D bowden layer fan blower

Pics shows how this part fits in the whole design (blue part). The part that fits the LM6UU bearings is the Play3D original part. Other parts conform my custom design for the Play3D's X-Carriage.
http://www.thingiverse.com/thing:1547122
http://www.thingiverse.com/thing:1527259
http://www.thingiverse.com/thing:1639559

and also used this awesome 40mm fan model for reference: http://www.thingiverse.com/thing:32246

My previous design of a layer fan for this extremely small hotend used a 30