I would've thought with both hubs being sprung and a steel disc that the setup wouldn't chatter like an RXT would. I will say that the initial break in of the RXT was hellaciously rough. I thought the car was gonna shake itself to pieces. But damn once it got a few hundred miles on it, the thing was a dream. And on the RXT I had one of the discs was solid.
It’s weird because the LMR kit includes 3 studded boltsOne per side is studded for use of a grounding strap from engine to frame/battery (-). But it's actually better to have a big ground wire from alternator casing directly to the battery (-) as long as the alternator has good contact to the engine block.