Re-designed fan mount from RatRig assembly and made a new holder for the duct and blower mount. All parts are printed with PLA for testing (except the duct) but need to be printed in ABS or PETG or something that can resist heat if you are using heated bed. I have not tried to print with this yet, but it looks good and is making a ok dip when tested in water. Be sure that the blower not hit something, you may need to adjust end stop a little bit.It may need some improvement, but I will give this a try. I am using a 5015 blower for this.
Prima Select ABS+