Started to do this yesterday. Dismantling and cutting the back plates down for the levers. On the first diagrams shown on the first page of this thread the extra hole position looks like you would need to grind the small post/stop from the base. It's not shown on the diagrams at all. But Andy's pictures show the hole higher up and the post is still there.

Just so I'm clear. Do I leave the post in place or grind it off?

Cheers.