I'm sure he'd be delighted to. You should however grab his attention as he's a very busy man. Make sure to tag him by typing
"@" followed by "Endmaster", and then repeat that three times, like I'll tag you:
However make sure to do that in an entirely new created thread somewhere, so he instantly knows who summoned him.
Or you could just assume his answer is "Yes" and add him as a co-author without his permission. That usually ends well. ^_^