Heaven help me - I've just bought a delta kit :-)

[curious aardvark]

Final fan duct setup:

complete duct_356x480.jpg

Duct without nozzle:

duct-nonozzle_370x480.jpg

Top down view of carriage and duct.

topdownduct_557x480.jpg

16x9x10 nozzle.

16x9x10-nozzle_247x480.jpg

As long as you use a 10mm or less height and length, the nozzle stays clear of the printbed.
You could have more height and less length. But 10x10 is pretty optimal.

can'tcatchmodel_640x332.jpg

I'll upload files to thingiverse after lunch.
Including just the clip so people can add their own nozzles.
Might seperate the nozzle modules and see if I can make it a thingiverse parametric script.

This duct is designed to fit number40's larger carriage. Not going to post the file for the smaller carriage - as people should be using the larger one anyway :-)

No extra screws, bolts needed. Fan push fits and is a good tight fit. Mounts using existing carriage bolts and nozzles just clip in and out, again a good tight fit, but easy to change.
I added a wire extension, wrapped round the main cable conduit and plugged into the fan socket on the motherboard.
So I've got complete control of the fan - which is pretty neat :-)

All in all, pretty please with it.

Without the fan overall weight is about 7gms. It's all 1mm walls except the bolt plat which is 2mm for better strength and a really solid fit.