Guy exterior man, you were right. I found the reason the door frame was not square was the bottom of the frame that includes the track was bent downwards in the middle. I set the middle of the door on a stack of newspapers so most of the weight was supported in the middle and let it sit in the sun for a few hours. Gradually the bottom of the frame straightened out and now I only had a 3/8 inch difference in the diagonal measurements instead of 1 1/8 inch like I had before. I don't think I could get it any better as the fixed panel was slightly out of square and there in nothing I could do about that. But anyway I figured this was close enough and went ahead and installed the door. It took two days because the sill was not level and I had to wait for the stuff I used to level it with to dry overnight. I still have to trim the interior. I only wish Certainteed would allow you the option of getting the door delivered wothout the fixed panel mounted in the frame like Superior allows. That frame and fixed panel are heavy and cumberson to move. Took me, my wife, and two of my daughters to move the thing. The job turned out pretty good if I say so myself. BTW, the window companies all say that their two man crew can remove the old door and install the new one in three or four hours. I don't believe they can do as good a job as I did in that short a time. They probably slap it in there and hide all the problems with trim.

HU-785456157, we don’t get a lot of water but some will splash out while showering or while reaching out of shower because it’s a small shower. We have a single 34” x 79”, 3/8” glass panel with a 24” wide opening (no door). It’s installed curb to the ceiling. Our guest shower is small - 30x58. Our master bath walk in shower with a glass panel on a knee wall is much larger so we don’t get any water splashing out. Another thing to consider is air temperature because the shower can feel colder during the winter with no door. We live in southwest FL so heat loss it not problem for us. The no door helps air circulate after the shower which keeps mold from growing.

Regarding drywall - Kerdi will be going over it. Regarding your comment about time to plan - Yes, I get it. As they say, hindsight is 20/20. No point bringing up the thought that I should have done the planning before, when I already realize that now. Have you experienced any hot messes when toggle anchors were used? please elaborate. I'm trying to understand this better. As I mentioned earlier, I'm not too favorable to using toggle bolts. But 2 glass installers have told me they do it all the time and have not had issues to date. That's why I'm posting here - to ask those who've already tried it.

Tape the reeded side too. It just takes a little more patience and a tool to press the tape into the reeds. A cuticle stick like used in mainicures works well, sometimes a bamboo skewer can work. Use a smaller detail brush and work carefully around the glass edge on the reeded side.