Turning the adjustment knob of a 3296-type trimpot with a small screwdriver is a pain in the butt usually doesn't work well without slipping off at least a few times. (I still don't know why they don't just design these trimmers with small phillips heads....)
Anyway, these here 3d-printed adjustment tools are the right thing for the job. Quick, easy, and fairly priced.
They are based on a reimplemented and improved version of this design, graciously created and shared by kennetht.
There are two different versions of this tool. One can be used with your fingers only and the other can be used with your fingers or by sticking it on to the end of a standard pencil. The 'pencil-cap' version has two styles, though they are functionally equivalent.
FYI! If you order the 'pencil-cap' version you may get either pencil-cap style.
