Print the "Bucket 11" standing vertically on its open end and the "Ducts 11" (or "Ducts 11 wider") laying on its flat side. I used PLA with 100% fill and glued the two halves together with superglue. Forgot to add - use a 0.16mm layer height - for best results "Ducts 11 wider" has slightly larger nozzles than "Ducts 11" "Ducts 11 stubby" has slightly larger nozzles than "Ducts 11" and is shorter in length - choose whichever one you prefer.