I rode with Ben (springville store) today and last Thursday, he is helping me right now with my clutching. He has a lot of knowledge of clutching and he has his sled dialed in. I believe he is only running a can and his clutch set up and his sled runs awesome. I have his weights in my sled right now, we are just moving the different weights around on the middle and toe of the weight. I gained two or so sled length just by doing the weights. I went up almost 4 grams of weights and i am using a steeper finish cut on my helix and it is pulling harder than ever before.I am not exactly sure how much track speed it helped with because my speedo doesn't work, but it's helped. I would recommend giving them a try.