The only reason I was thinking of going to the smaller ones is because the smaller one is within 400 pounds of my gvwr but yet 1500 pounds in reserve over real world weight. But it sounds like a question for the Moryde reps. And I'm sure they'll tell me the same thing as I'm hearing here - to go with the actual size needed. Only reason I ask is because I heard of some owners having to go to the lighter rubber pucks because it was too stiff. I will definitely start out with what Morryde says to do.
Dan