While I was building the tower I thought it was big and beefy. I used 1/4" steel and was happy at how heavy it was. After I installed it I noticed that it looked small in comparison to the jet ski's. When I attached the ski's I saw the tower flex a little as the ski's are on a slight slope. I was surprised to see the 1/4" steel flex.

But it will work for my needs to make it harder for some one to walk off with them.