Good universal mount with need for improvement

I bought the mount for my Sony Z3 compact.
Have compared many mounts, and wanted a mount the first time, the smartphone saves (padded enough at all contact points), and also get along with the dimensions of Z3c without covering of fixing the buttons to press or do. All these criteria are met, these mount very well. In addition, it is very well made.
When we then drove off and the first pothole, the only weakness of the holder has shown: It consists essentially of two parts which you have plugged together: The "arm which is attached to the disc, and the mount for the phone, however. these two parts can so easily be from each other, so that when vibration of the car, the cell phone is repeatedly fell off me is always the heart slipped into his pants ... Anyway, I have these two parts now simply glued together permanently with superglue -. Problem solved :)