Source: Dennis Flaherty (dennisf@denix.elk.miles.com), r.c.b., 4/8/95
Roast barleys differ greatly in color. What Briess sells, for example, is only 300L, whereas De Wolf's and other imports are over 500L. If you use anyone else's roast barley, scale back the amount accordingly.
The victory and cara-pils malts are strictly to taste, but the potato shouldn't affect the flavor in any way. The yeast is known to finish sweet.