I hover mine at 1/4 throttle with a YS 53 at 5000 ft. The four stroke is perfect for this at low throttle; plus I put in -75 (Futaba) throttle expo which gives me 3 clicks of adjustment during hovering. With this set-up I can do great tail slides. I can only get 1 1/2 turns in a torque roll before it falls out. BTW I do this all on low rates because I feel you tend to over-correct.