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Hi Simon
See my post on the 7th. I think you are only 5 mm out, but follow my procedure in that post. Yes, you will need to glue the dowels in place . Possibly leave them slightly proud of the surface and sand them level. Yes, you will need a 3 or 4 mm drill bit for the earth wire. Protect the guitar surface with cardboard, angle the drill bit and drill from just below the top of the new post cavity into the control cavity. If possible use a drill press. Its the only way to be sure the holes are straight.
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Hi Simon,
Gav has set you on the correct path re measurements etc.
I will add this though, when you go to plug the holes, try to find a dowel that is slightly larger than the hole and gently ( or violently if you have had a bad day) tap the dowel into the hole.
A few drops of a good quality glue- preferably an Aliphatic resin type, such as the Pit Bull stuff- will make sure the dowel stays put.
Now, when it comes to drilling the new holes I strongly suggest that you use a Brad point bit.
The reasons being that this type of bit will give you a flat bottomed hole and more importantly there is less chance that the drill will wander off and bore the hole where it wants to, rather than where you want it! Been there, done that ;)
It is rather critical that you get the holes as square as possible.
I would reccommend a slow speed on the drill so you have total control the whole time.
Good luck, and above all have fun!
