Hi Trebor357:
Unlike most here. I developed a very sensitive degree of feeling for tweezers. Having done Consulting for Both a Watch Company and a Laser mfgr. What I have taken to doing is as I have said in reply before. I etch the inside face of the tweezers if they don't have teeth.
What I mean is this. I take the tweezers and I close them, one side at a time of course, over a fresh piece of 320 grit, Nothing coarser, sandpaper, and gently but firmly slide the paper sideways out of the jaws. This gives a little "Tooth" to the surface. make sure to do both sides.
Note: many folks don't realize that they squeeze to hard with tweezers. It's a normal thing. It's like shaving, brushing Your teeth or driving a car. You gotta practice. The best way I've seen is this. Take a Flat toothpick ( they are slightly Wedge Shaped) and pick it up with a pair with or without teeth. Hold the toothpick a lightly as you can , as long as you can.
This will train your muscles in your hand to respond accordingly. Muscle memory is the key. Most of us don't have to handle tweezers very often. Our Muscle groups in the hand and the skin thereof are not trained in the subtle pressures required. THIS IS NO GARUANTEE! I commited a launch last night of a replacement Radar antenna for a 1/350 ship. Haven't found it yet!
You'll get the hang of it though. One or two parts M.I.A. in say a year, ain't to bad!