So this is a variations piece (once again) that I wrote based on my own original theme meant to explore cross-relations in a poly-tonal context.  I have to take exception to the idea that the minor 9th is the most dissonant interval.  I once walked into a bookstores music theory section and opened a random 20th century harmony textbook to a random page and read that the farther apart a dissonant interval is voiced the less dissonant it becomes.  You'll have to judge for yourself whether that is