Years ago we had an addition put on our house, in the basement we had a very nice anderson window installed. 20 years later we are finishing the basement, after framing the basement sqaure, i have come to realize that the window is not straight with the square wall i put up, the window is straight with the concrete block. From the window to the new wall it is 8 1/2 in on one side and 9 1/2 in on the other. Any advice on how to trim out and case the window so you cant really notice the difference? I know its only an inch but its been bothering me.