Woke this morning with no sign of the dust from Ian, bloody Christmas post, so I ground some more of my oak and stone and rubber mix to have a go, sifted out all none wood bits. Ground it finer, dried in the oven for 30 minutes at 150C, lasted 3 hours, and went out, just at the point that the postman knocked on the door with a parcel that looked like it contained sawdust - it did!!!
One quick clean of the CSG later and it was refilled with Oak from Ian and back under way, got 2kg of bacon in it at the moment. 2 hours on and no problems, producing far more smoke than my home made dust and burning down smaller too, have the door to the smaller smoke box ajar and the main one shut, just realised how bad a job I did of building, smoke pouring out all over the place, still, it's well aired!!
Thank you for your perfect timing Ian and The Royal Mail!!