Struggling with the end game, for a few reasons.
1. I cannot parse 20 across, although looking at the lines from the rest of that group leads me to suspect that it is the second letter which is un-clued.
2. The message from the extra letters from the non-group clues leads to gobbledegook.
3. My lines from groups 2 and three cross each other, which seems odd to me.
Any help would be appreciated.