I did three on mine, as well. Two on ends are used with a 10' loop of 5/16" choker chain for lifting whole logs, or when my approach to something that needs to come from one side or the other. The one in the middle is used for pretty much everything else.
You could run a slack chain between the two side hooks, if you were lacking a middle hook, but it multiplies the side force on the side hooks, by the angle of your dangle.
Don't laugh at my welds, these were done blind with flux core, before I had my MIG set up with proper gas.
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