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I used to have a sled that I made , but it really sucked.... Too heavy.
If you are pulling by hand, I would not go with an Otter sled.
I purchased a duck Decoy sled from cabelas look in the duck hunting section.(not ice fishing) because these sleds are for hauling duck decoys. I bolted two strips of wood to the sides two 1/4 thick panels off of that with a box on top. Buckets ,tipups icedrill etc on bottom. and tackle on top.