"We don't have a precise timeline exactly..." Ianto hedges, glancing to John with a raised eyebrow at the life-signs detector comment. Not that he wants to offer up the other man's tech for him -- he's got no idea what Rodney might do it, if he's going to frankenstein it into something else entirely, never to work as it should have again -- but John knows the other man better than Ianto does himself and if there's a chance that he actually does know what he's talking about and it might help...? Is he willing to risk it?

Well?, the look seems to imply, grateful that for the moment Rodney is so utterly engrossed with his lists.