@Bama...If your parts are inedible after an all night brine...Your brine is too salty. Cut back to 1/2C Kosher Salt per Gallon and there will be no issues...
I don't think so -- I've been doing this long enough to know I don't like pieces brined overnight is all. A few hours is enough for us. Allow me to show you my brine "recipe":
4 pounds Bone-In Chicken Pieces
Cold Water: 2 quarts
Table Salt*: ½ cup
Time**: ½ to 1 hour
* The large clusters of crystals in kosher salt dissolve quickly in water, making this salt a good option for brining. Each brand has a different crystal size (unlike table salt, which has a standard crystal size). To use Morton kosher salt, increase amounts in this chart by 50 percent. To use Diamond Crystal kosher salt, double amounts in this chart. It is possible to add sugar (in equal amounts to salt) to brines for chicken and pork to promote browning.
** Do not brine longer than recommended or foods will become overly salty.
( I cut and pasted this "recipe" from The Editors at America's Test Kitchen (2012-10-12). The Science of Good Cooking: Master 50 Simple Concepts to Enjoy a Lifetime of Success in the Kitchen (Cook's Illustrated Cookbooks). Boston Common Press. Kindle Edition. )
All my posts are based on my research, opinions, and experience. Your opinions and experience may vary widely. Fat cap up, fat cap down, charcoal, elec, propane, stick burner, etc... To each is own my friend. In the future I guess I'll cite my sources.
Incidentally, I do like the equilibrium brine calculations. I watched those sous vide videos last week and got some pretty good ideas from them.