Tips to control power drives?
If you are talking about golf drive on the course that needs to be control able, the height (10-20 feet) you mentioned is good. With a lower-line shot, you can prevent your drive to end way aside of the fairway.
Your question is more about technique. I would need to see your throw to analyse it. In general, you need to keep your pull loose and accelerate it towards the hit point. Its like a chain reaction: feet, hips, back, arm, follow-through. The flipping over issue sounds like your drive motion is not “pure” and smooth and the disc leaves your hand with a flutter?
I can give you one tip for power drives: Never use maximum power on a golf course. Always keep the focus on your technique.