Self centering bits

I have been installing a couple of Beckson hatches when I have had some spare time during the last few days as part of the upgrade to the cockpit on Mallard. A full story will be with you in a day or two as I want to walk you through the project from start to finish. But in the mean time I wanted to show this short video. It shows me using some self centering bits which are great for this type of work as the bit, as the name suggests finds the center of a countersunk hole. I apologise for the rather poor quality of the this video as I had very little room in the boat to set up the tripod, but I think you'll get the idea.