The hard shifting has been this way since purchase date. When cold, going back and forth between L and H is fine. It's after driving for awhile it gets extremely hard to shift. I had a local shop here look at it to see if the clutch needed alignment. Everything checked out good. But the shop does recommend installing a Hillman clutch kit, Supposedly that help keep belt temps down, and keep the belt from grabbing when it get a little warm. I've never heard of Hillman. The shop wants $500 to do the install. Is that a fair price?