Many thanks for the advice that makes perfect sense. I just wanted to use my time as effectively as possible and not go down the wrong path.
I have attached a template copy and mp3 file. This would be fairly typical of the ones I have written out with regards to the resources that I am currently trying to employ in the etudes. I would point out that there are a couple of fairly large leaps in the use of upper extensions. Particularly the one at the end of bar 7!!!! It is fun to play and I hope it added a little surprise to the listener. I did succumb to using the 5th as a guide tone as it seemed to help the flow of the line at the time given the template event choices written out beforehand.
Once again many thanks for any feedback which is invaluable to us all.
Best wishes
Chris