Hello, I am fairly new to the CCTV world as I have just recently started installing systems. I have installed about 15 systems with very little problems. I take pride in my workmanship as I try to hide almost ALL wires to make the job as clean and professional looking as possible. The only issue that I run into is when I have a two story house or apartment building. Normally with a single story home I drill holes and fish the wire from under the eave and into the attic with no wires showing. With a multi-story structure I don't have this luxury and it makes the install extremely difficult. Any thoughts, ideas, or tips?