Honestly you caught it way faster than most groups would.

Is a 60 year old tile flue that still checks out really the problem here? If it's smooth and the joints are tight, seems like selling him a liner is fixing something that ain't broke.

So who wins the battle of the century: the cloud app that logs you out right when you're in the basement, or the paper set that turns into a soggy mess in the rain? I mean at least the tablet gives you a paperweight after it dies. The real kicker is that RFI sitting in two places, that's not a tech problem, that's just nobody wanting to be the one to make the call. Maybe the answer is both, one guy keeps the paper and one keeps the iPad, and you duct tape them together so they can't ignore each other. Idk, seems like the same fight as always, just with a charging cable now.