Looks to me like that dust boot is working fine. Is your reprint to get rid of the duct tape, or to give more surface area for the duct tape to adhere to? 🙂
Let me know when you put your modded one up, that might just be the first thing I print… Is the plumbing 2 1/2 inch? I’ve been getting elbows and Ys and such in anticipation for my hookup.