G'day Mate.
Use your duel rates, have full throws & as much expo as you need on high rates, & use for hovering or whatever, & on low rate, lesser throws, & less amount of expo for "normal flying".
That's what they are there for, you might as well use em.
Also you should trim your plane, use this trim chart & follow the steps, it will make a good flying plane, a GREAT flying plane. http://www.palosrc.com/instructors/trim-chrt.htm