I would have to sand the inserts a good amount to even get them close. I decided on my V3 to just run the stock hubs as the plastic inserts fit those nice and smoothly with no binding of the hinge pins.
hmm, I don't recall any binding on the pins on mine as I run the aluminum hubs as that what came with my first vehicle and I liked the bling lol.
I did however when I did my first tear down had to punch one out of the hub as it was stuck. But I think I did this with the front too for the plastic on plastic connection. Be cool if there was a way to make the inserts alloy and secured with a set screw setup of some kind that keys them together.
I think what I did to help was add some lubricant to the insert to keep it sliding well. I'll probably try that dry stuff I got here that I use on the durango 1/8 pivot balls.