Phone clamp for flexible phone arm

I found the phone holder on the arm quite weird. Every part of the flexible arm is adjustable using screws, but the phone holder uses these questionable bending ribs to hold a phone in place? No thank you. I just made a quick clamp for phones which uses a screw to keep it in place. Also if it doesn't fit your phone all you need to do is print a longer screw and it should be fine.