Was wondering on any ones else thoughts on which to be better of the 2 , my thoughts are I have Ultrex and but the Ninja blade on it and not to impressed so far , before the ultrex I had a Fortex and use to chop thru weeds with out any of the 2 and never had to clean the prop , after installing the Ninja I seem to get clogged up and wrapped up to where needs to be cleaned off and I thought maybe I installed wrong but checked it out and sure seems right so what's your thoughts of the Grass Goat .