The system should also be fundamentally reconsidered by UCH.
The whole thing is made of quite soft plastic, so that it holds if installed according to instructions, more bad than good and is pretty shaky.
My modification:
I have therefore new holes drilled directly under the retention standoffs. This means that screws and plate holding webs closer together and more stable in itself.
Then I clamped foam rubber (foam) under the license plate, so that the license plate is clipped with more tension in the holding webs. In order for a permanent impression holds the indicator fixed in the holders.