I needed a longer duct part to clear the part cooling fan, but also still short enough to angle the hot air to the side of the carriage instead of the rear on my acrylic i3.
I lengthened the duct by 2cm.
Cron PETG PETG
Print speed: 30mm/s
Really nothing to clean up, however, if there is slight hair/stringing, remove before fitting the fan and to the cooling tower.
Selected the snap-on section, then used the stretch function to pull the duct out by 20mm