Derek-we know from the Irvine that modern Al-Si casting alloys can be coloured-and the Doonside case was from one of these-I was just commenting that despite Ivor F mentioning it in the appendix to the instructions as an option, I've never seem one either in the flesh or on Ebay leading me to speculate that very few cases were actually blacked. I have a vague feeling that the extremely rare-only 10 or 20? glow Doonside Mills produced by ivor as a whim from the leftovers of the project might have had black cases?
ChrisM
'ffkiwi'