Ever use Special B instead of the ESM? Just wondering about relying on the D-90 to provide the all dark fruits, etc.
I've used special B several times. It's a nice malt, but like all character malts it can get in the way if you use too much. It's also less fermentable than D-90. The D-90 will completely ferment and like the abbey monks claim, leave a more digestible beer.