- Joined
- Dec 18, 2019
- Messages
- 7,483
To mark the holes, use transfer screws. Screw them into the chuck and have the point facing towards the plate. Only have the points just barely sticking out. Push chuck onto plate and tap with hammer to have the screw points make a mark. Now you know where to drill. You can buy the screws, or you can make them. The ones you make won't be as good (hard), but they will be just fine for a single use. And think about how you will extract them! If you file flats on the threads on two sides you can get a pair of fine tweezers in to get the screw out. (For a blind hole.)