Use coated aluminum screw together push rods when running wires thru ceilings. They keep you from having to open a lot of celing tiles. Also you can attach a mini flashlight to the lead rod and see where you are going. (Music Supply Company has all kinds of great install gadgets)

You can run a metal fish tape down a wall, put a toner on it up in the ceiling (one lead to the tape, another to a metal stud or left hanging) and then find the tape in the wall with a probe.

Fiber glass rods are still the best thing for fishing a wall, especially when it is full of insulation.

Use different colors of cross connect wire.....example: blue/white for analog phones, red/white for digital phones...yellow/blue for co lines etc. Makes it easier to figure out what it all is and where its going especially when you have a big mdf.

When using a pull string to pull a wire, loop the string around the wire three or four times before you tape it. The harder you pull the tighter the loops get. Don't pull so hard you break the string.

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"Old phone guys never die, they just get locked in some closet with an old phone system and forgotten about"

Retired, taking photographs and hoping to fly one of my many kites.