Kirk you can't do it in a way of Close UD / Wide UD because would be left to some interpretation. If you choose to do it you probably need to do it with a average of the 3 cards, in eg: us picking 7-5 rounds or 115-113 type of scoring, since there are only 6 options (half as KO rounds) excluding the rare draw rounds, might be good for the round to be won only if the round's ratio or scorecard posted with the pick is dead accurate.
12-0 (120-108]
11-1 (119-109)
10-2 (118-110)
9-3 (117-111)
8-4 (116-112)
7-5 (115-113)
IDK... What you think?