That is just wonderful, Matt. I'm sure that the sink and counter will come in very handy for your outdoor kitchen.
I have a cast iron double sink that someone gave me years ago that is in use at the farm. Like yours, the drain parts were removed, leaving open holes in the bottom where I have always kept buckets. Just recently I found the necessary fittings marked way, way down so I spent the money to be able to hook them to a drain pipe. I want to divert the water to a flower bed without me having to carry a bucket again. Don't understand it, but I'm not getting any younger here!!