Some good input by Graham. I would also suggest to have a look at your right shoulder. If you want to create a tighter arc you will also need to pull that back (twist) a lot more so you are not blocking the rotation. At the moment a lot of your turn happens when you're already back on flat ground.
Try to incrementally take a straighter line into the wall and try to get the full twist at the top of the arc.
Don't expect to het there straight away. Trust (and try to enjoy :-) ) the process.
Commented on Following the last Live Chat, I'm wor...
17 May 02:30
I can't really tell from the video so ignore this if it doesn't make sense. Where are you looking when approaching one of the banks? Looking some way above the coping of the banks rather than at the coping has helped me het higher in the past.