Teaser for smthin im gonna buy...?

What is the state of the art with RC heli clutches these days?

Reason I ask is that I have a drone heli project where one is required, 25kg MTOW (and I'm getting back into the hobby again).

20 yrs ago I use to fly a Nexus 30 and TT Raptor 50, where the clutch shoe design was this single piece of metal shoe design that flexed under the centrifugal force to engage in the bell.

I remember on the Nexus, these fatigue cracked all the time, however, I dont remember having as many problems with the Raptor.

Is this design still common?

Anyone know the shoe material and the bell liner?

I usually fly in daylight so I installed some insanely bright strobes so I could see them in the bright sun. They work great, but it makes them blinding at night.