Haven't tried the ego yet? My partners are interested but I jus ordered 3 more halos that makes 5- spektras customer service is by far the best I have come across for any rotaries! Any problems will be ironed out in no time- that's worth it's weight in gold to me- I never had so much control outlining with threes- i like the 3.2 for threes- as I get to a larger liner grouping I'm still working on that? Any feedback on that would be great- ex- stroke length-- volts - give -needle hang-