Re: the use of scribe molding in a cabinet install as opposed to scribing to the wall
25 years in the biz and I've never seen a scribed cabinet. If your walls are flat enough, it won't be necessary to run a scribe mold, what I would recommend is to have the cabinets installed, then decide if a scribe molding is necessary. You could also caulk the cabinet/wall joint instead of using the molding, if necessary.
You say there are only four panels that would be scribed, that isn't exactly true, any place the cabinet hits the wall and there is a gap, there will need to be scribing, that means at least both sides of every cabinet.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!