I have been using the CIPA mirrors for four years with no vibration on a 2005 F150. They work great. I pull a 2011 Rockwood fifthwheel. Can see
down both sides. I am even able to see my tires on both sides.
I cut four strips of velcro 1" X 2" for each CIPA mirror, placed the strips on inside of CIPA housing to cushion the two mirrors. I used the fuzzy side only!
I also cut narrow strips to place on the CIPA housing where the housing fit against the truck mirror on the very end where the two mirrors make contact.
Once I adjusted the mirror, that was it. I have not had to adjust the mirror since the first adjustment four years ago.
Yes, I have walked into the mirrors along with my DW, damn near tore
my shoulder off
, yes they are still intact. The knobs have never worked loose on mine.
I even put the fuzzy velcro on the contact side of the wedge that fits between the truck mirror and the CIPA mirror. Another words the CIPA mirrors are padded all the way around where contact is made with truck mirror.
Good luck on your choice