I agree with most of that post but .035-.040 is huge for ring end gap. You should have about .004 per 1 inch of bore thus a 4.030 bore should use about .016-.017 on the top ring. There's less heat in the second ring so you can get away with less, but I don't recommend it. The second ring is really only along for the ride. Many Stock and Super Stock racers put very undersize rings in the second groove because the rules state it has to be there, it doesn't have to drag on the cylinder wall.
Anyway, I'm getting ahead of myself. If you are using the hypereutectic pistons then you need to consult with the piston manufacturer for ring end gap specs. And they must be followed or you'll end up with hyperexplosives instead.