Got a Lightspeed Sierra for a starter headset. I wear a 3X m/c helmet so headgear fitment issues aren't new to me. I like the sierra features, but the clamp force and adjustment are the same axis and the headset slips occasionally. I'll pass the sierra to the Mrs, and am looking for help finding a quality and durable anr/bt headset for me that doesn't slip. Aircraft is Rotax Superstol. Thanks!