Here we go then.
I am planning to drill the holes for the grub screws in my Sierra uprights.
I vaguely remember from a fitter machinist / bench fitting lesson 18 years ago that there is a formula for working out the size of hole required when tapping a thread.
I am planning on using
these (M8 Grub screws).
Therefore (Oh cleaver people) what size hole should I be drilling.
Thank you in advance.
Next If I bring my uprights to Stoneleigh could someone bring a M8 Tap to tap the thread in my new holes.
Standing by.
Cheers Ginge