how to tighten thread on the valve lash adjustment screw

I haven't seen this question answered yet here.
I went set the lash on my solid cam today and noticed a couple on the adjuster screws are too easy to turn when setting the lash. there is a tiny 1/8" hole on easy rocker hole in the rocker where you can see the threads near the cup of the pushrod. That hole seems to be there for a reason to tighten the threads by maybe going thru the hole with a flat tiny screw driver and just nick the thread so it tightens up the adjuster screw. Anyone ever done this ? Thanks !