So I was getting tired of having my cradles rotate everytime I hit with my kayak. The Yakima bars are round and no matter how much I tighten them the alwys end up like this.
So I figured there has to be a way to keep them straight so over to Home Depot I went and $8 later here's the finished solution.
I took a couple of 3/4" electrical conduit, cut it to the correct size, drilled a couple of holes in each end to line them up with the J cradles, flattened out the ends a bit and now they don't rotate.