1. You can get parts from coffeeparts and genovese, though I never used the doser lid.
2. Yes, there is supposed to be a small pin for adjustment. It is surprisingly expensive - maybe there is a bolt at your local hardware place that will fit. If the collar is stiff, sometimes its nice to have two pins.
3. No, its not supposed to go click click click when adjusting grind size ... its a stepless grind adjustment system, remember? ;P
4. I dont have a hopper for my Kony, so I am currently using a takeaway cup with the bottom punched out. Perhaps not a brilliant solution if you care about looks!