Maybe its minor to most, but it matters when you need it. The app is super easy to use too. By the way, the instructions are strictly diagrams and not words so be intuitive, we made a couple of mistakes and had to take apart and redo and laugh at ourselves for not paying close enough attention . The only thing is,im afraid im gonna lose the pair coz’ it’s kinda loose,the lever back. The bars on my motorcycle are 7/8” diameter, so the longer screws worked perfectly. The spindle seems just a shade smaller than the 120, the rubber mat flopped on pretty easily, unlike the 120 which I had to snug down around the spindle with my fingers. I surprised him with them and he was super excited to try them out! (Ex. BUYERS BEWARE! I got a waterproof case for my iPhone with earbuds that wouldn’t fit into the audio jack without an extender, so I got these.