I have been following this thread ever since it came actually. I'm not soooo good @ these parrot behavioral problems BUT I must point out 1 thing:
You said that he is chewing on the bells. You seemed calm with that though... wich made me worried. Cause I have actually red MUCH about toxids and stuff you should not put to you birds. And I have Been told that these clocks ALSO makes a threat against birds. It depends on where you buyed them. If they where sheep, they can actually contain toxids as nickel, zink and stainless kemicals!! Wich makes your bird devolop all kinds of freaked behaviors. Sadly... many birds have died this way

And try to not have colored plastics in the cage. An easy rule is to THINK AS NATURAL AS POSSIBLE!
Hope I could help and REALY good luck with your beautiful bird.
GOOD LUCK!