I press like Kass says but I do set the seam with the iron before I roll up the top piece. It seems to press more crisply that way without distorting the block.
I find it interesting that folks don't see this past year as harmful to the planet with three hurricanes just in this country alone and all the wildfires out west. Add in the earthquakes and other disasters elsewhere and I see the planet in pain. But each to their own, I guess.