I recently added a Lowdown Shifter stiffener kit to my playseat challenge and my DDPro. Wow what a difference. It still has some flex but it's really really helped with the lateral movement I had. I know that 8nm is pushing the limit of what this seat can handle but for me and my situation it works really well. I hope some day that I'll have a dedicated spot in my house for a real rig but anyone on the fence about a similar rig, don't hesitate. It's miles better than I ever thought it would be.