3 pc Vanity

Well, this is a screwed up build. I have a small bathroom. The vanity goes wall to wall. If I built it as a single unit I don't think I could get it installed. So I split it up. Since there are drawers in the center the deck doesn't matter to me. Plus I'll be covering it with a 1/4" pc of plywood to cover the seams and make it look pretty even though I doubt anyone will ever see it.

I have is setup so I can install the left unit and then the right unit and then slip the center unit in and screw it from the rear to make it into one cabinet. This way I can scribe both the left and right stiles to the wall and have a nice perfect fit.

So I am nutz?