[Canuck12345]

Thanks again Sho305 for passing along your vast experience.

Last season I installed a heavier spring a (without tangs) and the sliding sheave. It did make a difference, but not to the level I am trying to achieve.

I wish I kept the old spring to try winding it up as you suggest.

I am about to pull the cart out and try shimming the spring. Ironically I won't need to worry about the spring binding up at higher speeds because this cart will never be going any more than a slow walking speed where it is going to be used.

Appreciate your help.