I measured Charm for her Abetta saddle. But I'm not 100% on what size gullet to get. She measures 6 3/4 inches exactly. Arab tree is 6 3/4 inches QH tree or full bars is 7 inches I think I should go with the full QH bars with a thicker saddle pad, but I'm not sure. She has a medium wide, flat back, so she should be an easy fit. But she has a huge belly (think hippo). I'm a bit worried that my new saddle will rock, side to side once she looses the belly and tucks up. Any suggestions? I really want both of us to be as comfortable as possible for longer trail rides.