Sensor and Front Active Cooling (CTC / FlashForge/Replicator)

The idea behind this is to mount a sensor + 2 40mm turbo fan without having to worry for dimensions, this is specifically designed for all the Makerbot Replicator 1 dual clone, that don't want to drop the second extruder, since it comes in handy with ditto printing, and want the cooling of the piece, for better look and aspect of the printed parts.

I remixed the thruit00 idea plus mine backcooler "tiny" walls idea, but this time with thicker walls and a curved and separated fan design, as on