I don't think sitting on a tile for a day or two should be that big a deal, I finished a bulk of both of mine in one day but decided to wait until the next day anyways, to catch flaws and touch it up with a fresh eye. The progressive revelation sounds interesting, but either way, the wait to see everything is what makes it really interesting, I think.
anyway ptoing, thanks for the replies. I'd like to do some more tiles but I just don't think I'll have the time this week so I'm looking forward to seeing what you guys come up with!