Automatic 360° Photography Turntable

I would like to implement this your project but I would like to mount a more powerful stepper motor nema 17 (12V and 1.2-2 A). In addition I would like set:

  1. a delay time between 0.5 and 10 seconds after each rotation and before shooting to avoid vibrations during shooting;
  2. a shutter time to use with setting B on camera;
  3. a delay between rotation and rotation;
  4. I would like to add also a wire for the shooting (for use cameras other than Canon and for flash).
    How should I modify the project and which driver should I use instead of easydriver?
    Can someone help me please?
    Many thanks