I have three Thunderhorn BOA's. One is an older small Fry, then a new small fry and the other is full size.
I, as was stated above, have them attached at the fades. They work well and have not caused me any tuning problems. I have tried several others and have not been pleased with the "lighter weight" strap ons. They just seem "dinky" to me. I like the weight the Thunderhorn adds to my LB. I can, and occasionally do, take my quiver off when in a tree stand. No change in shooting method.... I also shoot Arrow Dynamics arrows which may have something to do with the tuning question.