Dwight I can't speak for the floatation devices you have but my floater dock was built with plastic barrels. It is 10x10 and has a 4x16 walkout. I didn't put any floatation in the walk out. I see you are going too very wise. My dock sets at a angle until you walk out on it because of the weight of the walk out. If I were to do it again I would have built the dock portion longer to overcome this. As in your case if I was doing it again I would put the 16 ft longways out into the pond and the 8 ft as the width. Besides when the water level drops you'll be in deeper water with the dock long ways. Just my opinion based on my on experience. She looks good keep us posted.
