One of the reasons the “set it and forget it” method you used is so reliable is because it is nearly impossible to over carbonate your beer using it.
The table that tells you how much CO2 will be in your beer is an equilibrium table. Given time, equilibrium is the point at which CO2 can no longer be absorbed for a given pressure and temperature.
So, your beer stored at the same temp under the same CO2 pressure, won’t continue to take on CO2 once it’s at equilibrium.
FWIW: when I hook up the CO2, I don’t unhook it until the keg kicks.
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