Yeah man they are pretty sweet. If I were to do it over, I'd for sure cut down the cup and lower it to almost the bottom. Hardly any bubbles go past the top of the bubble plate. It's all good though, this thing is pulling much harder than my old one. Going to play around with modding the impeller a little more. Anyone have an extra one that you're not using? seeing that these hipped with both. I'd buy it off of you.