Who made the screen the wrong size? I have had a problem repeatedly with Draper, where they make a screen just right except the white area is 2" too high or too short, got a couple where they forgot to paint the black border on....
What's an installation woo?
You can rarely get the corners to line up using what style of what brand?
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw