An improved design over my previous cooling fan arrangement. This version attaches the fan to the X carriage.http://www.britishideas.com/2012/10/15/improved-reprappro-mendel-cooling-fan-bracket/Print one of each part.Put a M3x18 or longer bolt through the two parts to create a joint.Use M3 bolts to attach a 40mm x 40mm x 10mm fan.Attach to the top of the X carriage using the four existing accessory bolts.Angle the fan so it is pointing down towards the hotend and tighten the bolt at the joint.