Well, there's no problem with the construction itself. First I was just going to make one of these to suit my needs, and do it the way I wanted from scratch. But when I thought about it, it would make sense to do it so that other stuff that's already out there would fit. It's no harder making the mounts 800 mm apart instead of 750 if it's so. It would be nice to have the measurements so I can see if they at all fit what I want to do at least. I don't think I care about doing a detachable rack with that board on top for example, I'll do that integrated in one piece.