I dont use them on Maier fenders.
The bouncing is more related to a loose/worn seat latch, or worn or missing rectangle rubber bushings on the sides of the subframe under the fenders.
You can add some large thick washers under the seatlatch pegs and it will tighten up the fender wobble, or you can wait and purchase a locking seat latch that is being made for the R right now.
Should be a few more weeks..They will not even move at all with these latches being made.
Here is where my long useless list of stuff nobody cares about should go...
Proudly NOT a member of
"Team on the Teat"