I'm curious to know if many of you buy 27x41 frames for use with both 27x41 and 27x40 posters? I ask because I'd like the flexibility this would allow, but recently I used a 41" frame (Hollywood Poster Frames) with a 40" poster and I'm not fond of the look. Do any of you use something behind the 40" poster if framing in this manner? If so, what? If it matters, I plan on purchasing the frames from Spotlight Displays.