Bass reflex slipstream aeroport 4"

Hello,few days ago I was made this concept of bassreflex tube for my subwoofer. After few days of testing I like to share this model on thingiverse. Bassreflex curves are my desing for better sound performance with no turbulence in subwoofer box. Diameter is 4" or 10cm. Tube is 18cm long, For long tube you dont need supports or brim. For reflex cover use supports.
Infil around 15% is OK