This...is...AWESOME! I've been looking around for some decent software to make 3D model mock ups of my house and stuff. Architecture has been a hobby and interest of mine for years, but it's been near impossible to find an entry-level CAD program for free, or at least for ultra-cheap.
Thank you, Guru!
"At the end of every hard-earned day, people find some reason to believe." -- Bruce Springsteen
Interpretation of the file extension is on the client side and should generally be case insensitive. Bear in mind that file extensions go all the way back to the DOS days and that DOS was an entirely case-insensitive operating system.