Whoahhhhhhhhhhhhhh! He pulled that damaged feather out. I found it on the cage floor, root and all, no blood. I guess he knew it was messed up.
Here he is, minus right-angle feather (visible in previous shaming vid, performing a percussion tune he composed, using plastic links and his cage-top. I believe he is titling it "Ode to the Parrot Forum".
Cick