The arm is well built and very thick so nothing will flex, but a beeline isn’t exactly heavy. If evotech have made the arm universal and the end attachments are item specific, so it would be great if they sell just the attachments at some point, say if I want to mount my phone, I don’t need to buy a whole new arm as well. I’m not giving 5 stars as the screen adjustment handle rubs up against the arm, not enough to stop the screen moving, but enough to notice, which bothers me.