The DF125 doesn't weigh what you think it does. It's shippable via UPS in 2 boxes. One for the body/battery, the other box for the legs and stakes if it requires stakes. I'd say full of food, 200# max. The thing about floating platforms is that you have to make it wide enough so it won't tip over when you get on it to fill it. Been there, done that trying to fill a feeder that was on a post from a boat. The boat wouldn't stay close enough to the feeder without 2 people in the boat.
Also, the platform has to be anchored or tied off in such a way that it stays facing a certain direction.
My vote is for short docks (floating or fixed) just for the feeders.
