Report "I have A Kenwood Gourmet FP400 that has been very little used and is in superb condition other than the following. The bowl shaft plastic coating is deteriorating and I think that probably indicates there is some rusting under it as it is obviously a metal shaft. I am able to buy a replacement shaft but I need to know how to replace it. I have removed the base cover but need now to know the next step. An exploded diagram would be very helpful"