Wally,
Most every photo I have found with Native Americans holding "gull-wings" the strings nearly touched the belly of the grip.....maybe a couple of inches brace height, tops. That would have to hurt some, Think ya might want to go low with just enough to clear your bow hand when ya loose an arrow. Maybe 5" or so. That's just my opinion, maybe some of the other guys have more experience with this type than me. I try to brace all of my bows realitively low (good brace tension and no hand slap) to get as long a power stroke as possible. JMO
rich