time zones - depth estimates, page-5

You've done the estimates at 7' per hour - whereas I believe they expect it to be slower as they go deeper.
3' an hour from memory - but might be wrong.

I just don't want people always expecting things faster than they can be delivered, or holders become despondent.
If only patience could be bottled and handed out you wouldn't be jumping out of your seats waiting for something that is a fairly long and complex process!