Looking for advice on motors and esc. Can someone explain what part kv plays when picking a motor and the difference between sensored and not . I run mostly 6s so what would be a good replacement. I've looked at castle creation but again can't really understand the different combos. Not fussed on price but naturally would rather not pay top buck if there's no real need for it. My notorious is basically stock with the exception of changed diff oil and cosmetic stuff