Hey man how are your doing! i was told you are the man to talk to about impellers. i am building a rickter xfs and it will have a dasa 950 8mm stroker, limited b-pipe,protec ingnition, 46mm dual carbs with r & d filter, intake grate and thrust trim system, i am currently running a 144swirl 14/17 pitch with a stubby cone. my buddy wanted to trade for his 11-17 hooker but i am not that smart with the impeller part of things. please let me know what you think.