Thanks for the replies, but I don't actually own the horse, I just take lessons there once a week, and once a week at a different place. So it makes it really hard for me to do the kind of schooling exercises that you're suggesting.
Its starting to get frustrating now, all I want to do is practice, and work on applying what I'm learning outside of lessons but I can't.
At the same time though I can really feel that my transitions are improving a lot, in particular canter - trot transition and trot-canter.
When I get a horse I'm not going to be able to afford one with the same amount of training on it as the school masters I'm currently riding, so I want to get an idea of how to do things correctly before I look at getting my own horse.
I think one of the reasons I struggle rebalancing the horse in the counter canter part of the loop is that I worry about riding forward and holding/containing the energy because I don't want to inadvertently cue the change. I think that I completely back off at X beyond maintaining the canter...
I've got my lesson at this place tomorrow so I'll ask my instructor about it then and maybe we will be able to go over it again in the lesson.
If anyone has any tips about the best way for me to visualise (and understand) how to ride forward without cueing the change then I'm all ears