"I haven't," he says with a sigh. He scratches the back of his head with the end of the pen. "If I had, I would not be so worried about Lan Zhan finding his way back here. And I think you are right -- it needs several layers of precision to land properly. Far more than simply distance, as it would back home."

He blows a loose lock of hair out of his face.

"I will think on it. I'm certain it can be done."