Quote Originally Posted by bargeloobs View Post
Nah I've got some of those. All good for drilling the body where you've got plenty of meat under the bottom of the hole but trying to make a hole for a 3 mm magnet in a 5mm control plate, the lead point in the bit would pierce right through. I like the router bit idea but I haven't got one the right diameter.
Simple workaround is to file the tip down, leave just enough to stop the bit wandering off. You only really need .5mm tip length.
Another good one is to use Forstner type bits, but getting them smaller than 5mm can be a challenge.