Yay, think Ive solved my problem.
I was still playing a balancing act between getting the grind fine enough, and avoiding metallic squealing noises - not good, so I could not resist more tinkering.
Well this morning I managed grind fine enough to clog silvia, and avoid the squealing as well, heres how:
I loosened the screws and bolts that mount the motor and gearbox to the based plate, thus introducing a small amount of movement to gearbox shaft and lower burr. I then screwed the upper burr all the way down until it engaged/locked on the lower burr - the two burrs should now be centered on each other. I then did the motor and gearbox screws up while carefully backing off the top burr at the same time, until the burrs were free and the screws done up tight.
Bingo, less noise for a much finer grind. Now I have the problem of having to back off as the grind is too fine - a problem Im glad to have
The grind is nice and consistent too - no more speckles of "bits" through the coffee. Though Ive been introduced to clumping now - cant win them all.
cheers all.
- Kevin

When you have it stripped down run it and have a close look at the shaft for any movement (KEEP FINGERS OUT OF THE WAY
) Also with it turned off see if there is any freeplay in the shaft (signs of bearing wear).
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