Put one of these on the 300, the thing is really capable in the tech stuff but my clutch finger gets tired. Action on release gets delayed a little, somehow they store a little energy on the return stroke to lessen the next action stroke.
It looks a little clunky, had to change the bend in the guard a wee bit to fit around it, big knob on the underside allows you to adjust how much assistance the spring gives.
At first I wasn't impressed, checked the stocker with my little pull scale and it was about 13 lbs; Clake was 12. Then I started spinning the little knob in to add assistance, went down to 3 lbs with more to go. Scorpa pull is a little over 3 lbs....but the action is better.
Have to wait another month to try it out, got a partial knee replacement around Christmas. Was out on the 500 today but it was just roads, no dirt. It seems like it will be just what I was looking for, probably end up around 5-6 lbs for the best balance of action and load.