Quote Originally Posted by craig747400 View Post
For the scale length, I used the ruler, starting at the 10mm mark from the face of the nut, 334mm to the 12th (-10mm = 324mm), then 658mm (-10mm = 648mm) to the middle of the high-E saddle.

I’m off to London tomorrow, so I will have a good look at the bridge hardware when I get home and do some ‘finishing’ around those holes if they look a bit rough (good idea).

Your drilling advice was what I was planning on doing, and had seen using Google … and yes, I have access to a drill press and will make sure I have brand new Brad-point drill bits when I do the job.
There are lots of videos on YouTube addressing mounting a bridge without a drill press, but you do have access to one, you'll have to be sure it has adequate "throat depth" in order to appropriately accommodate the guitar body. (throat depth = distance from centre of chuck/drill tip to the support post of motor/table)

re: The neck mounting holes, yes, you need to enlarge them enough so the screws can be passed through them without needing to screw them in. Usually about 4.5mm with those kit neck screws I believe.