lownslo,
I will agree with most all of what has been said above, but you have to look at each use. On a fast sail plane you would want a sharp pointy trailing edge, but when these get damaged then all that work is down the drain. If you are flying large 3D style aircraft, you want a tapered surface, but the trailing edge will still be square. If round, you just don't get the same control athority due to aerodynamics. On a slow flying 4-star model you will be just fine with round trailing edges, you don't need to taper them either. The plane has been designed to be a great second airplane/first tail dragger. I used a 4-star to get back into flying gas after spending 4 years racing cars and doing a bit of slop flying. I have now moved into giant scale aerobatics and having a blast. Be careful not to over power this model, it doesn't need the extra power and if you get the plane going too fast the flight will become very harry before you ever flutter the surface.

Mo