I use the True Fire X-Caliper release in Relax to Fire Method. My trigger release is set very light and I must hold the trigger to draw. Once anchored at full draw I just start thingking about releasing and it goes off.

The only problem I had was getting used to fingering the trigger before shooting. As a rifle and handgun shooter and being military trained, this is contrary to the learning process that began 54 years ago (when I was 10 years old with my first shotgun).