I'm replacing a deck post that has horizontal stainless steel wire running through it. I have to remove the wires, drill holes in the new post and replace the wires. How do I ensure that the drilled holes are centralised and horizontal? And can I re-use the wires? How do I unclamp and re-clamp them?
I have never done wire rails, but have seen them done. There is usually a turnbuckle somewhere in each line to tension the wires. Unscrew that and all comes loose. Using a drill press is one way of drilling exact holes. Another method is a drill with a level built in.