Practice makes perfect. Imperfect is better. Music paper is senile.
Recordings do a better job.
Rehersals are counterproductive. Repetition is a downward spiral. Choice of instrumention now determined by the ability of the individual. Since the distribution of a CD lasts only 60 days you will have to make many recordings to be in the pipeline. Each new advance in recording media requires the musician to sustain creativity for an ever increasing length of time, therefore composition is impossible because the next CD length will be 144 minutes per side.