This isn't necessarily best pratice, but it might give you a few ideas and increased flexibility. Experiment with where you position the head joint when you assemble your flute. This is a bit like rolling it towards you, but obviously not quite the same, as you still need to adjust the position of your jaw for different octaves / volumes and so on.
I always had the opposite problem, I was a very very quiet flautist. Then I found that positioning my head join so the hole tilted away from me meant I had to play louder to hit the right harmonic, and reduced the tendancy to overblow or switch into the next harmonic up when playing loudly.
Still not an expert speaking here... perhaps wait round and see what our resident teachers have to recommend.