Scott,
I don't know what more a guy could do? Did it all and it sounds like you did it right! The only thing left is rotating parts! Wheel, rotors, drive shaft, alignment, bad shock?
I know full well about the theory on the internal full time balancing of tires. Did you know that early paddy-wagons (
) and ambulances ('50's-60's) used "mercury" in the wheels to do the same thing? Then it of course was ruled illegal. Not only was it used to balance the tires but it also allowed emergency vehicles to make faster turns without flipping over! Now there is a trivia question for ya!
.
DV