Keith, I have the black glass rudders that came out in the mid '80s. Saw some carbon epos at my dealer, they're bad butt. Are the black ones no good? I thought the white plastic ones were the junk.
I've seen the molded pastic ones come in both white and black. If your rudders are glass or better you're ok. It's the molded ones that suck. If you can deflect the tip of the rudder with your hand, you've got the molded ones. You can also look at them and tell.