String	Cover	Recipe	Size
# data from Eric Kohs
smooth	off	pure	73
rough	off	pure	77
smooth	on	pure	49
rough	on	pure	57
smooth	off	mix	41
rough	off	mix	44
smooth	on	mix	27
rough	on	mix	31
smooth	off	pure	66
rough	off	pure	76
smooth	on	pure	50
rough	on	pure	45
smooth	off	mix	37
rough	off	mix	43
smooth	on	mix	27
rough	on	mix	26