While not in a posotion to refute your outcome from independent testing, I laud your 'well, let's try it and calibrate the effort' thinking.

I almost don't like web resources like the massive development chart. I think it takes the considered review and reconsideration of the next round of trial and error out of the pickure.
I prefer to experiment and converge on the best solution for me. I might start with a commercially recommened optin as a starting point, but I always wander away to see what the sesnitivitires of the process are.

My only exposure to sulfamic acid to date was to see it in commercial tray claners I have used.