He finds himself feeling unexpectedly emotional over this one of all things and he does his best the hide it under cover of taking a closer look. The fact that Jack put so much thought into this and came up with something that might actually work hits him harder than he thought it would and he can't quite believe he's this touched by the gesture.
"I think that will work," His voice is a bit hoarder than he would like and he clears his throught before looking up at him gratefully, unable to resist setting it aside and wrapping his arms around him gratefully. "Thank you for this."