Really nice start!!!
The Tile looks GREAT!!! I do have a question about it though. Did you glue any of the joints when you were building it or putting down the plywood? The reason I am asking is that the corner brackets you used are only as strong as the screws that hold them in! I usually build my own stands and hoods, and took 3 years of Cabinet and Furniture building in High school and also do some woodworking on the side, and GLUE is what makes your joints strong! A thought I have is IF the stand is tall enough you could always place cinder blocks under it and use plywood under the cinder blocks to keep them from scratching the nice new tile floor you put down! Also you could add wooden block pieces in the corner of the stand and glue them in before screwing them in to strengthen it too!
The background looks GREAT, and I can't wait to see it/them finished!!!