Shendrones Terraplane duct

Original terraplane ducts are molded but i tend to break them regularly. So i decided to model this almost 1:1 copy of it. Printed it in LW-PLA - its too brittle (yellow one), but then i used Prusa PETG and it works just fine. (cant find any photos of it)

Print with 4 perimeters and 15 percent gyroid infill, auto supports on 35 degree angle and it comes out great.