Hey dude, did they show up yet? Sorry it took so long.
Ya the cup floats in the lca, after it's bolted to the bag its not going anywhere. If you use that method on a stock front setup the front won't lay out. Because you don't utilize the upper spring pocket area, the bag holds the truck up at full deflation.
Now modifying your lower control arms gives you that three or four inches you'll need for it to lay. Cut it out to support the bag, giving you plenty of room around it. Then weld and brace the hell out of it.