This is a tube guide to provide print cooling using an aquarium air pump (like http://www.amazon.com/Hydrofarm-Air-Pump-Outlets-7-8L/dp/B002TCC46U/ref=zg_bs_2975471011_7) and some 3mm silicone tubing.
This provides short bursts of cool air directly aimed at the print nozzle, which helps reducing warpage by not cooling the entire platform.
I use this setup to print very small and detailed parts which would otherwise turn in to blobs of ABS.
You can simply screw it in front of the fans. I used the stock screws, but removed the fan guards.
Usually I only use 1 tube and point it at the L or R extruder. For dualstrusion you can use 2 tubes of fabricate a Y-tube.
Print with 0,1 or 0,15mm layer height, 2 shells and ±30% infill.
I used ABS, but I guess PLA could work as well.
No support needed when layed on its back.