There was a certain amount of drilling to insert cables but any dust was cleaned up. The digital camera is not obtrusive and gives a good photograph. Chris at CRISM was recommended to us by our coverage agent (the top advice you can obtain truly!) Chris at CRISM and https://cctvinstallationinwakefie00099.blogsumer.com/35510016/the-smart-trick-of-cctv-installation-in-wakefield-that-nobody-is-discussing