I'd like to go bitless every now and then (say on trail rides or lazy days). She currently works best in a broken snaffle curb (I tried a regular snaffle but she'd only ever been ridden in a curb and likes the curb better). My trainer said she was used to/likes the poll and under the chin pressures instead of just the mouth pressures. So what kind of bitless would she listen best to? I have a bosal, mechanical hackamore, and a sidepull I could possibly try. I'd ridden her in a halter once but she didn't seem to like all that nose pressure either.