I am willing to bet that everyone who tangles for any length of time has those few designs that are just difficult for them.
Showgirl was one of mine. Everytime I did it, I would end up with something that wasn’t quite right. You can see some of my failed attempts in the smaller tests in the image above.
I kept practicing, for several months, on and off. Then, after following a lesson from Eni Oken, the light bulb came on, and I finally got it!