Fan will not turn on with Simplfy3d

[printbus]

So many of the cooling ducts for axial fans leave you with little or no airflow, since those fans aren't intended for applications that create backpressure. The air just leaks back out around the blade edges. The "nirvana" approach I've wanted to try is to mount the radial blower fan somewhere on the printer frame and then run flexible, thin-wall silicone or latex tubing from the blower to a custom duct that mounts to the rear bottom side of the x-carriage. Started to look for some tubing once but didn't through with it.