Back in the early 1980's while I worked my way through university as a bench-tech doing more than a thousand VHF/UHF radios over those years I was given a set of ceramic trimmer tools. It eliminated that entire sequence of adjust, remove tool, measure, add tool, adjust, remove tool... I could adjust while measuring without influencing the RF characteristics of the circuit. It even worked fine for doing those tiny multi-turn pots with the brass screw and the trimcaps and the hex tool for doing the slugs in inductors when peaking the helical coils.
If you do an amazon search on "8pcs adjust frequency anti static ceramic screwdriver kit" you will find what I currently use.
The original tools were just a piece of ceramic that was jammed in to a wad of rubber that was inserted in to a tiny cardboard tube.
Be careful, ceramic is very fragile and you can't do anything more than trimming adjustments, never use it as a conventional screwdriver. But it beats the pants off of those plastic tools or the ones with the tiny metal tips.
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Tisha Hayes, AA4HA
Sr Engineer, 4RF Inc.
Tisha Hayes, AA4HA