You're all good on the Magic Window part! That's part of my job, with my "Book Coordinator" (BC) cap on. I'm also signed up to Proof Listen all of the chapters of this book, though that's often a separate role.
The filename bit is toward the bottom of the first post, just above the link to the uploader. One of those things that's easy to miss, but now you'll know exactly where to look next time.
Now, on to your notes! Just two little edits to make, and no re-takes are necessary:
@ the end of the file, we need a bit more silence - I see a little under 4 seconds, where we'd like to be consistent at right about 5 seconds
@ 17:03, there's about 4 seconds of silence here that might have been missed in editing
You've done very well on both reading editing - the more so since I can't tell where probably most of the edits are. I certainly hope to hear more from you!
When you're done with those edits, please name your MP3 file "heldfastforengland_12_henty_128kb.mp3", upload again, and post both the link and the duration of the file. Todd will need the file duration when he goes to catalog the book, and it helps me spot file transfer errors in the meantime, so we ask folks to make a habit of sending it too.