If you already cracked your touch controller this is an easy repair to get you back in the game. It can also be used on undamaged controllers to help prevent cracking. Just slide the 3D printed ring over the controller sensor ring, line it up in the middle and you're ready to go. It helps give the sensor ring of the controller more rigidity and structural stability minimizing flex in the ring when impacted which causes the cracks.

Mine was cracked completely in 2 at one point and half way through at another and this ring fixed it right up. friction holds it in place and if you happen to hit the controller again the 3D printed ring can easily be readjusted.

The design is meant to minimize any sensor obstruction and worked fine when I tested them - hope it helps!