Selecting MorRyde Pinbox bushing size

N-Trouble wrote:
Getting ready to purchase one of these pinbox and see they can be ordered with different size rubber bushing depending on weight of the trailer. My 5er has a 12Klb GVWR and I'm trying to decide between two different sizes. The lightest one is for 11,500lb and under and the next size up is 11,500-14Klb so I am right in the middle of these two options. Just looking for any feedback from owners of this pinbox and which size they went with relative to the weight of their trailer. I'm leaning towards the 11,500-14K version.

I have the 11.5k MorRyde on a 5th wheel weighing roughly the same. I still get a little push pull effect. It's not too bad but I'm thinking about going to the heavier rubber.
I have my trailer level when towing. I added air bags to my truck last year. It helped somewhat but I think a heavier rubber bushing would be an improvement.