Sub Frame connector conundrum

I did mine the same as LX. The difference is night and day when cruising down the road.

I guess to use your analogy a little different would be to take 2 pieces of flat wood about 3 inches long and glue a strip of tin foil in between them. Grab each piece of wood and twist in opposite directions and see how much flex you have. Now glue 2 pieces of wood under the tin foil to the wood and try again, see a difference?