One of the hardware parts I was able to save were the clamps that hold the metal pilings (the dock legs) on the side of the dock. But then I realized that the design of the old clamp was different than the newer ones.
The critical difference is where the clamping bolts are - these are the bolts that tighten against the pipe leg. On the old version these stick straight out whereas on the newer version they stick out the the side.
I realised I compensated for the location of the bolts by installing the legs on the inside of the dock so they were not a safety hazzard.
The TIP: Consider where and how you will be using the hardware as you build your dock and especially the safety considerations.
;-)