3rd row almost up...have to make a decision as to height of windows. I'll likely take a while mulling that one over...want them low enough so one can easily see out while reclining on couch, but not too low that furniture will block a portion of window...hmmm. I like being able to make things up as I go along...lol, but I will overthink it. How high is a normal kitchen table? Being in RV doesn't help me... I marked where all rebar is on interior, so when I insert verticals (when all rows are up), I will know where to put them (they just need to mate reasonably close, but not be tied together). BTW - I mentioned the possibility of cutting the Styrofoam in situ but take that back...haha...when cutting Styrofoam you leave a mess of shavings, which I don't think you want in forms. Easy to pull them off and cut on side.