Mark both the front and back end 1 1/2" from the ends.
The first rough cuts were made with a knife.
Don't round over the ends yet, just sand the side profile.
After the sides are tapered and even then round the top.
Here's the finished front and back.
Round over the edges down the entire length of the conduit strip
When rounding the ends remember, the front end is twice as high as the rear rudder end.