Quote Originally Posted by micky2 View Post
Yes that would be the way to get the centre point marked out for drilling. as long as you use the right bore size needle.
Was going to use some rod I have but it was not a tight fit in the bore. Delrin also is terrible to cut with a hacksaw or drill as it is fairly soft and blades and the drill wanders. Used 3 drills in increasing sizes up to 4.5mm to keep the hole centralised to where it had to be. Worked great, the rifle groups well. Found that wood files are best for filing Delrin, give a better finish.

Baz