I'm looking at some trolling motor additions. The first one is the Kipawa replacement blade for my Terrova. The second one is a Ninja Grass Blade or something similar. As I look at the Kipawa blade, it appears to sit farther past the motor body . Meaning the hub of prop may be longer than the original. I could be wrong, but, that would eliminate the NGB. The Shank blade appears to be adjustable. Any idea's?