esshup,
You were right on the money with the tippy part. The 40 inch by 16 foot dock is so tippy as a matter a fact we are building a T for it as we speak and will be taking it to the pond tomorrow. I am putting a 10foot T on it with two 30 gallon barrels on each end and bolting it to the 16 foot walkway. I think / hope that will solve my tippy issue. I have taken some pics along the way and I will take some more tomorrow once we are done and it's floating.
RC