On 2013-05-27, nestork wrote:

well over 20 years now and have not damaged an O-ring yet.

It's not the oring that might get dinged, it's the oring groove
surface becoming gouged. Plastic electronics adj tools shaped like a
flat blade screwdriver are much more practical and are easily
obtainable. This might not be so critical for something like a
waterproof seal, but for something like a high vacuum seal, it's
definitely critical.

nb