Oh, I didn't know all that either, interesting! Yes, our hobby provides knowledge we'd otherwise never have had... such as the meaning of finger pedaling or interesting facts about musicians and composers 🙂
I'm about halfway BYAM. In fact I didn't realize I spent two weeks on it already - it feels like I didn't even spend a week on it so far. Which is a compliment to the arrangement of course. Some parts are easy, but a few bars need a lot of attention! And also he does some tricky things with slight variations. One bar features two quarter notes, but the same two notes are connected in another bar, adding some sly syncopation. I am beginning to think Christian is evil 😃 Ok, maybe all good teachers are, they need to be 😋
Yesterday I just started the second half where the LH changes its pattern. It's a fun part, it sounds so funky and at least that part is not overly hard. You said the piece was exactly your level, for me it is a bit of a stretch - not impossibly difficult, but definitely something I need to break out in a sweat for. Which is a good thing every now and then 😜