I looked over the notes this morning and I think the simplest path is still the best one.
I would start with the short version first, because long explanations tend to create extra confusion.
When I answer messages like this, I try to say what I know, what I do not know yet, and what I plan to check next.
That usually keeps everyone calm and avoids a string of follow-ups.
I also think it helps to send one clean reply instead of five scattered ones across the day.
If you want, I can draft a version that sounds natural and not stiff.
I can also trim it down if the tone feels too formal.
Give me an hour or so because I want to make sure it reads smoothly and does not wander.
I am nearby this afternoon, so if something changes, send me the latest details and I will adjust it quickly.

I finally had a little quiet time last night, so I sorted through everything piled on my desk and cleared most of it out.
That felt better than I expected, mostly because the clutter had started bothering me more than I admitted.
I found the note you mentioned, and it turns out I had already put the important part in a separate folder.
So the good news is that nothing was lost, just placed somewhere too logical for me to remember later.
I am going to rewrite the rest in a cleaner format because my first pass was all over the place.
Once I do that, I can send it over and you can tell me what sounds right and what still needs work.
I would rather keep it simple than overcomplicate it with too many side points.
If tomorrow is easier for you, that is fine too, since I should be free after the morning rush.
Either way, I have it in hand now and can finish it without much trouble.