Jeff - you worry too much. Try to find thighs that are about the same size ( I know its hard to do some times). I then trim the thighs to get them even closer to the same size. Heres the trick tho, just trim the meat under the skin and pull the skin back over the meat.
You can always trim excess skin after the cook.
Chicken is easy, pork on the other hand is a different animal.
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