Even with the install of Progressive springs I still had the clunk. The other day our local dealer did the fork oil change from 10w to 20w....................under warranty! What a difference. So far so good, the clunk has disappeared.
Another big difference was the addition of "Jack's O2 mod". I was a little sceptical before buying it, but that soon vanished with my first test ride with the O2 mod installed. I can now actually ride slow without all the lurching and bucking.