Wow great job! I'm glad you found it helpful.
BTW, I have since written about
turning one of those into a double carrier for two parrots. I still totally recommend for having two separate carriers whenever possible. However, sometimes you only need to travel a small distance and can't bring two carriers and this is helpful. I use this for transporting my parrots in winter so they can keep each other warmer under an electric blanket. I also used it when I wanted to bring both to the vet and I needed to take the subway. There was no way I could have brought two carriers on a trip like that with me.
BTW I can't tell, but I hope you made a safety clip for the top door. Considering that the entire weight of the carrier hangs from the top door, failure in the snaps would cause the carrier to fall open and bird to get scared and fly out.