“I could be using them wrong, however, when the spacers are both facing inwards, the internal spacing is wider than the stock mount area material thickness so the indicator has in/out freeplay when mounted.
You can either flip one of the spacers (which will then try to spin when tightening) or use a washer that is wide enough. Doing this will mean you'll need to be careful not to over tighten your indicators or you will break the spacers.
Using a washer will also mean you can do 4 indicators with one pack.”
