Once more into the breach...
okay, it's not that dramatic, but I did spend over an hour tonight - nearly and hour and twenty minutes - prepping one sheet of drywall. Things did not go smoothly. It's a shame that this has been really my first experience doing any rough construction (of any consequence anyway). If I were more sure and practiced, my walls would be closer to plumb. That would have made a difference this weekend (see drywall trimming, above) and certainly would have helped tonight. I was at the other end of the room and getting ready the second sheet on the screen wall. I measured and cut it to length, then marked and cut out the access hole for the water shut-off. I went to test fit it... First I found that the measurement of the wall height was somehow about 1/4 inch taller than the ceiling 8 inches out into the room, so when I (by myself, mind you) set the bottom at the foot of the wall and begin to "walk" it up, it hit the ceiling 8 inches out from the wall. Back down she comes for trimming. After about three iterations, it stands up. And here's what I find - I had to stop and take a picture:

You'll notice there is a gap almost 1 3/4 inches wide at the bottom left. This is where I heard the trombone music again. But not to be deterred, I measured and trimmed the left side - cutting off about an inch and a half at the top, down to nothing at the bottom. I knew that would shift the whole piece left about an inch and a half, so I had to widen the cutout for the plumbing - and there goes the usefulness of the piece I so careful saved and marked after I removed it from the whole sheet a few minutes earlier. I also went ahead and notched out the right side for the clean-out access hole.
At this point, I've been going at it for over an hour, moving it in and out of the theater to my working stack, laying it down, standing it up, slowly crushing the corners (actually only a very little of that). I set it back up - notice it's not secured in this picture - and here's what I've got:

I have half a mind to scrap it and try again tomorrow, making the shaping cuts more carefully and avoiding all the extra leg-work of moving it around and messing up the edges - especially the left edge that I trimmed - I did a pretty poor job. Would any of you scrap it? Or would you call it a hard-fought win and keep moving?
Edited by HopefulFred - 4/2/13 at 7:07pm