"NG 10 Years" competition: RESULTS !!!https://nikongear.net/revival/index.php?topic=11252.0Current status: 88/150 supporters
For the small set screws it's very important to have a screwdriver tip that fits perfectly. Hollow ground is the best way to go also for all other flat screws on lenses - I grind the myself from a slight oversize one. Gunsmiths use them as well. Precision hollow ground is the strongest!