I did my first sink after watching this video about 2 or 3 years ago. I had problems with it humming up from over sanding and lack of knowledge and finness. It was still a success, but took forever! so through my search for knowledge and 20 or 30 sinks later I learned some tricks. thanks for this video. it was pinnacle in me having the balls to try it on a customer's job! and it was a success. looking back, hell of a gamble, and I wouldn't advise it on a paid job. try something for yourself first. Once again thanks for opening a huge door