Re: Cutting butcher block
Sorry I missed your post earlier. I was going to suggest a strait edge and a circular saw to cut the large into small.
As far as the sink cut out their are 2 ways that work well for me. One is to drill a hole near the edge of the cutout but inside the scrap area and cut it out with a jigsaw. The second way, which I prefer with thicker material, is to lay out the lines and plunge a circular saw into the line and cut the straight parts with it then finish up the corners with a jigsaw.
Be sure you live your life, because you are a long time dead.-Scottish Proverb