I would go with that Barkly.
Its strange sometimes its lunch that sorts any problems out. Something just clicks and then solo is only 3 circuits away.
There are all sorts of theorys about how to teach the landing all of them correct.
90% of the time when I had problem students it was because they hadn't really understood the basic lessons. A couple of hours revision and back to the circuit and things were sorted.
I was only ever defeated by one student