[coolhandcountry]

YOu will get more run time on 6s than 5s. You will also get more run time on 8xl than a 7xl. I can get 25-30 min on gp 3700 18 cells on a 9xl. witha lipo 8000mah with less weight and such looking at an hour of run time. I have not ran a 8xl so can't help there. Mike has some 8 and 9 xl coming. supposed to be in any day now. They are bk wanderer 20 series.