My thought on these is based on growing different sized plants. These autos can really suck up serious nutrients especially when they are stretching to mid flower. I have grown well over 10oz plants down to 4 oz plants. I naturally wouldn't know the difference initially so there for the larger plants would absolutely starve.
I also like to add in bloom nutrients as late as possible. This tends to allow the plant get to its fullest potential before flowering. Some times I can get to day 50 before seeing preflowers. I guess the only thing that can settle my concerns would be to see a beast of a plant with tabs alone.
Sorry to thread jack. I'm excited to see how things turn out for you.