OK so I know that the low end needle is for roughly 0-50% throttle and clockwise is leaner and couter clockwise is richer so will adjusting the low end improve acceleration? If so should I wait till I get my new Nitro Racing clutch(its on it's way) to tune it? Also I was advised not to tune it by my LHS because I am new to Nitro RC so can I tune it safely and if I need to, how could I reset the factory settings?

I Have a Nitro RS4 3 Type SS and it is a little sluggish