upgrade window shades

My wife and I own a '95 Rexhall Aerbus and the living area shades from the factory were in poor condition and we decided to replace them. We looked on line and decided that the replacement "RV" blinds were too expensive and cheaply made. We went to Lowes and ordered the correct width and length day and nite shades. Yesterday we installed them. I had to remove the back plastic cover on the "head" of the blinds and drilled several holes (number dictated by the length) at the bottom of the "mechanical housing" in order to mount them in the same manner as the originals. They look and work fantastic. The only change from the original install is remounting the valance. The valance fits tightly at the top and does not allow for screwing the valance at the top inside of the valance so I predrilled one hole on each side at the top area diagonally from the outside of the valance into the wall and screwed a screw into the wall. Hardly noticeable unless you know they aren't factory installed. Much cheaper than "RV" shades and much higher quality.