Hi all.

Feel like a nitwit - but can somebody explain the difference between the Speedmaster 20, 40 and 60 rudders?? I note it not to do with length of blade.... is it width maybe?? Or thickness??

Also - why would you choose a tapered edge over a straight edge? I note most hydro builds use a tapered blade while cats use the straight edge. What's the reason?

Hoping to increase my knowledge here... cheers!