hi again, Found where the part went. Bizarre - now it seems to grind much finer - did it on around 10 and finer than when I did it before at the lowest. And yes, i did have the top burr seated properly. So thanks for help - sent by the ether i guess. love your work Coffee snobs - no doubt the next step will be roasting my own as im down in the otways 2 hours from melbourne.