A word of caution here, from someone who does not make or use smokeless tobacco. White-stem burleys turn brown before they have finished "color-curing." That is to say, the pigments change faster in white-stem burleys than do their other constituents that also need curing (albuminous proteins and carbohydrates). So if you plan to process white-stem burley leaf immediately after color-curing, I would suggest waiting several additional weeks for the rest of the curing process to run to completion.
Bob