My Maxxum 80 had a ww2 stock, that has seen some serious use and been ground down by rocks a good bit. I was never happy with it, but it was fine. Well I was looking for a three blade replacement and all I could even find was Kipawa so I bought one and sanded and filed off all the sharp casting flash and installed it.
I'm impressed. Prior, my speed had to be over 20 to move the boat at all, when brand new. Now 10 will move the boat, and it feels powerful and quiet. I'm much happier, but it seems ridiculous that no one else makes a replcement prop.