My design is a fan shroud for the BFB 3.1 DH. It fits the 80mm fan that comes with the printer. The design is so that it wil cool under both extrudersSettings that worked for me in Axon2Mat = PLA Fill = 40% Fill pattern = hexacon Raft temp = 222degC Object temp = 195degC Layer thickness = 0.5mmPrint config = 1 extruder Make sure Thin wall is selected!1-open Axon2 2-open file 3-place object so topside of shroud is on printbed (justaboutfits) 4-build in Axon2 with above settings