To me, Edberg uses a weak eastern for his forehands. OK for a net player's game, not ideal to pound from the baseline against consistent players.
In my case, I often use a conti everystroke grip when I play right handed. I play right handed maybe 3 days a year, so the normal strong SW can get flyers and groundballs on consecutive attempts. Conti gives me the controllable low slice, lob, and drop angles needed for doubles. Pace is lacking, but sufficient for 3.5 level play.