Glad to hear you liked it, Arline! 2 points, though: Don't over-brine, or you'll risk a really salty butt, some time. Stick to 12-13 hours, and you'll be fine. Second - the "pink salt" (#1 Instacure) is nitrites, not "chemicals!" You get more nitrites, than this, in a plate of celery! This is naturally-occurring substance that just "happens" to cure meat! It creates that beautiful pink "smoke ring" that gives the meat great visual appeal (most folks associate the pink ring with "real" BBQ). It's just for presentation, not to affect the taste.
Bottom line - don't believe all the tree hugger hype about nitrites; they get more in their salad than you'll get in 1 tsp added to a butt brine!