Yes I did and it made a huge difference in the down shifting in the mud. It was really easy to do and I did mine all by my self. The hardest part is pushing the secondary back on and lining up the helix. I'm really glad I spent the $300 and did it. The only thing is I would recommend buying a set of rollers to have on hand when you do the change. A couple of mine had flat spots so I ordered the steel rollers from Dalton to put in. You won't regret the buying one for sure.