Don’t you think that six seconds plus “some indeterminable time” (5 or 10 seconds) is more time than having only six seconds period on the clock? I was using adding 1 second to the Bronstein because it was mentioned earlier as cure for later time differences. I don’t think it matters if you add 5 seconds or 5 minutes as that time will disappear during the game. When you are down to six seconds you are down to six seconds. The two formats are very different in how the game ends, no matter what is done earlier to compensate for the difference. So they are equivalent but not the same, and the psychological perception and experience as the game ends seems more important than any supposed mathematical equivalence. But, in the end, we are talking opinions which is why we can differ and disagree.