Adjustable Roller Rockers

No loc-tite
Hand snug tighten.
So your best to keep the adjuster from moving. Take note to where and how it sits/positioned when you reach the point of where you want it set when tightened. As you tighten it up, the adjusted may rotate. Try and figure in how much it will rotate as you reach the final moment when it is tightened up enough for you.

This may not occur on all of the adjusters. Once tightened to spec in the place you want them, they will be fine.