Yep that’s absolutely correct, and they nailed it in the BR scene and the build up to bats and Joker finally going face to face, a la diner scene in Heat.
I get what they’re going for as it’s how his hair was under the police cap, but it doesn’t work at this scale as you can’t get the knot small or tight enough.
I did that with the very first HT release. Cut the blazer so it works kind of like a shawl, and then sewn onto the insides of the coat.
Sure works to slim bulk as you mentioned but effs the accuracy 💯