Nope, not yet. I am working currently on 2 pieces: Akita Ondo and Kuroishi Yosare Bushi.
Also trying to get hold on the maebachi - ushirobachi thing.
I am sure you seen this video:
This drill helps a lot!
Also I found it is much easier to switch maebachi-ushurobachi positions if your hand resting on doukake is bare. It prevents it from sliding during the position change.