I'm thinking about buying a set of these for my dually Duramax but I am just wondering how are the primary lugs going to hold up since they have to use those adapters. Is anyone using these wheels on a DRW Duramax pulling loads at near maximum GCVWR? If so, how many miles do you have doing this? Even though nothing may have broke at first, I was concerned about prolonged metal fatigue on the primary lugs. Thanks for any advice or input.