Wow, just found this thread. And I am definitely going to have to take a browse through when I have time later tonight.
We have a cross beaked EE rooster named Peedles.
He was the largest chick out of the six we hatched back in mid June by far. He also took the longest, nearly a full 24 hrs from when he first cracked his shell until he finally made it out of the egg.
Growing up he's always continued to be the biggest. And has done wonderfully eating the crumbles and chick starter. Over the past few weeks though I've added sunflower seeds and cracked corn to their feed and he doesn't seem to be doing as well with that and the bigger pellets. So I may have to switch back over to crumbles with just a handful of sunflower seeds and cracked corn thrown in the run for everybody to play with.
His crossbeak doesn't seem to be progressing much and is actually quite mild compared to some I've seen. Once every week or two I take the nail grinder for our dogs and gently sand off the edges of his beak a bit. The top just a little to try and make the hook a bit more shallow and the bottom to try and realign it a bit or at least get it back enough that it's not hindering him from picking things up so much.
I will try to get pictures of him up later but he's the white chicken in my avatar on my daughter's shoulder.