Michael, I'm still deciding on which side I want it to drain to, which is why it's centered now, although the more I think about it, the more I may actually leave it flat. But, if not it will slope down to the left and the drain will move. I'm also changing the back piece just a tad.
On a side note, I did a bad thing. I uploaded these to gallery, assuming it was my own individual gallery. It wasn't and this apparently upset some folks, which was not my intent. I'm trying to figure out how to delete them from the gallery now. Once I do, I'll reupload here (as I've no figured that out). Please excuse me, I'm relatively new to this site.