KO RSXone10 is IMO the best LP servo available. My second choice on a LP would be the BLS551/S9551. But the KO is just a little smoother and feels more connected. I ran my one10 for 3 years before finally needing to replace gears. I ran it in my mod touring car, stock touring car and 4wd mod with no servo saver. When it stripped out I bought another (response version) at the track and sent in the broken one (wasn't 100% sure it was the gears so I let KO fix it). Their service was great and had a fast turn around time.

Just my .02