If I may offer a positive reinforcement alternative that has worked great for me:
Parrot Training Perches
Combined with extensive positive reinforcement trick and flight training on them, the birds learn that these stands are their place and readily fly to them just to hang out. They can be strategically placed around the room or house to provide the birds a safe "bird approved" place to land. Between the cage tops, trees, and training perches I have provided, except to land on me, the birds barely ever land on any places not meant for birds.
I also build custom parrot trees. Inquire if interested. I give 10% off and free shipping on any product (including trees) when combined with a set of
Parrot Training Perches. Many people have already taken advantage of this discount. The trees and training perches use the same type of perch to make it even more recognizable as a place the bird is allowed to go. I can't keep up with the orders so these aren't listed publicly yet so you have to contact me directly if you want more info.