Gil has wondered that, too. They know how tall Oz will become, but not how long it'll take before he reaches it. They should be measuring him now. Would he be offended? Would he not want to talk about it now? More things that they've never discussed...

"I was just relieved that you were back...that was enough for me," he admits. "Ah, that was foolish, wasn't it? Either of us could leave again at any minute."

They shouldn't be wasting time getting complicate.