I could probably do the window myself since you can sand down your cut and the window molding basically covers everything. I'd have to go get a dremel though. The back blowholes I think I'll leave to professionals. Lian-Li cases are nice but they only put one 80mm hole in the back and the cut of the hole is rather obstructing for the air to get through (the back can fit two 120mm holes). The inside of my case was getting rather hot for my tastes.