I would higHly recommend practicing on fpvfreerider and helix6. I split time between flying line of sight (los) in stabilized, los acro, and fpv acro. It has improved my abilities dramatically. Oh ya I also changed to pinch on the sticks from thumbs like I used to fly my planes. Pinch gave me way better fine control. My zmr flew fine with default pids. Just got better with the at pids. I just couldn't get them to stick.