I ran the brass ones last year, loved it. But I only put 250 miles on one sled and 600 on the other. Bad year for me. I sold the 250 sled with the washers, I pulled them from the 600 mile sled. They didn't appear to wear much. I think I am going to stick them in my 175 this year and buy the Z-broz lockout for the Freeride. I beat the FR much harder than the 175, that is for the special days.I turn 50 this year and have been riding since I was kid. I would say I am better than or equal in skill to most but also know that I can't hang with some of todays younger riders. Some of the older riders too for that matter . That being said, I locked my T-Motion out. I rode for half a season with it and as stated, the sled is squirely on a tracked up hill. Any little track edge or rut would move your weight just enough from where it was to make the sled want to go in a direction that you hadn't planned for. I choose the brass lockout so it should last a bit longer than the Skinz plastic washer version. I think when you are a bit better of a rider or you challenge the sled more than most people, it is better to have predictability. So...if you are going to try and go places you shouldn't be or hang with riders that better than you, lock it out. You'll be happy you did.