Bob,
I posted this question about 1 year ago and am finally moving ahead with my pond renovation. Since I will be draining the pond I am planning on adding a stationary dock instead of a floating dock. I like what you did with your pilings. Here is a silly question - how did you get the concrete in the 4" PVC? Did you make some sort of funnel? Did you mix the concrete yourself? About how much concrete did each pipling require?