Tasted the first bottle of this tonight, and it was a tasty beer, although not entirely what I was aiming for. The colour appears far darker than the 10 SRM I'd calculated it would turn out to be, and it's got a slight caramel taste to it, which I wasn't expecting from such a small amount of carapils. I think if I make this again I'd cut the dehusked carafa, and the carapils, and possibly reduce the IBU slightly.
In terms of the mineral quality from from the sulphate added, I think going for a 200 target was spot on for this beer, and something I would use again.