In General, it is very hard to achieve reasonable sized big ears safely on wings with Reflex profiles. This due to the fact that reflex profiles are very collapse resistant, and tend to pre-accelerate before collapse when a collapse is induced by pulling the A-Lines. Though not high, the risk of inducing a Full Frontal collapse exists, and this is why we do not recommend Big-Ears on our Reflex wings.
B-Line Stalls can safely be done on the Lift and other Apco wings with a reflex profile, however, this may be hard to achieve wile flying the wing with a motor, due to the added weight that needs to be lifted…
Instead of Big ears or B-Stalls, we recommend using the accelerator or Trimmers, combined with low RPM / Idle on the Engine to achieve a high sink rate for descending safely.