Tevo Tarantula Pro Blower Replacement

This part is a replacement for the original Tevo Tarantula Pro (RS) hotend cooling.

I had considerable issues with the original, as it was pointing to the head block, causing the heat block to cool and force the temperature of the filament to increase. The result was that small perimeters (~2-6mm) would be a blob of molten plastic as the plastic did not had time to cool down and the air was not going directly to the end of the nozzle.

Check before-after image, on the left before the blower tip, on the right after.
There's still some stringing but that's not what this intends to improve.

Consider this version an improvement, partially tested and checked.

I'll further experiment to understand different aspects of the air dynamics in order to improve it.