I have a 3 year old Mahachanok 8ft tall tree planted this year. It keeps flushing constantly. I tip pruned couple months back the tree still in good shape. However the new growths spurt out fast and most of them (new growth) fell-over (sagging) horizontally. The tree shape is look ugly now. How far back should I prune this time? Should I trim it back all the new growth to build up the old branch strength? or just do what the book say (20-inches branch).

Thanks,
Joe