I understand why telco technicians are paid a good bit - it’s a real pain to run wires inside a wall. I tried replacing the wiring that connected the kitchen extension to the phone line, and what a mess. I tried just attaching the new wire to the old, but they came apart, and down came the original wire from the wall. Thankfully, it was easy enough to run it through the wall, and down the edge (this is in the basement stairway), and replace the wire. Now it’s a little cleaner than before, and it’s nice to only have 1 length of wire, instead of 3 segments as it was before.