I've had time to play with my KG79 and now have the grind setting spot on, in fact, I may need to adjust the coarseness setting back a notch as I don't think it will grind coarse enough for my cafetiere.
On a side note I was given a tin of Illy over Christmas and having used it years ago with my old Gaggia I was expecting reasonable results.
Are they grinding their coffee coarser these days?
No matter how I tamped the grounds there was no way to get a decent shot, the water simply flushed through with little resistance. I certainly won't be buying another tin especially since I have this grinder working well.