Frank, here's a view you should recognize, taken from LBSL. The slabs are on the right.

Just a couple of weeks ago Joe Q and I were talking about this very same thing as an alternate approach to UBSL when a couple of guys showed up at LBSL. They mentioned they had taken this route before, the primary reason being to avoid the scree on the normal route to the left and around the boulders. They said the slabs themselves weren't too bad, but that getting to them was actually a tougher job.