Rudder Question

[kevmen]

I just finished repowering my 78’ inboard. When the mechanic took it for a sea trial he made a comment on how well the boat handled - especially how well it turned vs other inboards. He then pointed out that someone had welded an additional 4” of material on the rudder. It has been like that since I have owned it so I thought that was the way it was supposed to be. Is this something that is normal to do? Have others done it and seen the same improvement? The guys that have the original rudder, do you feel the boat could turn better?