Tried them type,, they should make you nervous,,, not safe over a big bump. The universal I use locks it in so good even the biggest of bumps not a concern. Keep in mind, if you get one of those custom mounts, if you use a case you will have to take it off. I use the "barly there case for my eVo and with the mount im using i can keep my case on. There is a video on youtube for this mount that shows someone violently shaking the bar in which the phone is mounted to and it is amazing how it stays on no matter what.
EVO-LUTION 3D