When you think they are close to done pick them up and see how far they bend. It they are done they will bend very easily. If they are not done they will hardly bend at all. The danger with his is if they are over done the rack will probably break. i usually use my black meat handling gloves and pick them up gently in the middle and slowly lift them to see how they are bending.
"Ron Rico, Boss. You can call me Captain Ron..."
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