I am about to machine down some dually hubs to make it into a SRW application. I was looking at another members hubs who had them done at Wagoner Machine (WMS). On the wheel mounting surface flange on a standard from the factory SRW hub, the mounting flange is 1" thick. On a standard from the factory DRW hub, the inside flange (where the rotor bolts to) is 3/4" thick. So one would assume that once the DRW hub has the outter wheel mounting flange cut off and the hub is machined down, the 'spacer' that is welded on should be 1/4" thick. WMS uses adds a 1/2" plate to each hub rather than just a 1/4" plate. Which also would ad ANOTHER 1/4" to the front track width (now 1 3/4" wider than the back axle on each side) Anyone know the reason behind this? For strength or? Just curious, and WMS isnt open over the weekend, so I thought I'd see if anyone else knew the reasoning.