Air Duct with Blower fan adapter

Basically I took some of the top popular fan ducts for a Rep Rap 3D Printer and added a couple things in Tinker Cad and made this. Must i say the the blower fan entry hole is a good size but I put some hot glue on the side just to secure it more. It is not the best one but it will do. Also, i used this for my Tevo Tarantula.