I am also an apprentice and I have only flown two redtails, so take this for what it's worth. I found that if you want your passage redtail to hood well when you really need it (medical procedure, late catch a mile from your vehicle, etc...) then you had better hood the bird on a regular basis. Maybe it was my hood training, but when I stopped hooding my second bird for a week or two there was a noticeable difference in her willingness to accept the hood.
I know some falconers that do not hood their redtails and some of them fly great birds, but I am going to continue hooding mine.
Daniel Parker
Work hard and build your dreams, or someone will hire you to build theirs.