I kept a group of 6 adult Bali retics. They were very aggressive snakes and never calmed down. Even with persistent handling (and much biting) they never relaxed the slightest.
I never bred mine. However I did have a Tiger breed with a Bali a few times, but I never had any eggs produced. My largest Bali was between 10-11 ft. My personal opinion is that they are one of the most attractive retics out there, but hard to work with.