[Koby is...definitely not shrugging the arm off. In fact, he might actually give himself a shoulder strain from trying to hold still, trying to make sure Luffy doesn't move away. Though, of course, he'll (reluctantly) surrender that when there's actual food to eat. Food he can see now, and smell -- not that he ever doubted Luffy, of course. His ability to detect food is superhuman.

The question gets a nod, thoughtful and not a bit weary.] It's the hardest thing I've ever done in my whole life. But it's...a different kind of hard from anything else? If that makes sense? It's not a bad hard.