Ronnie. The Hitec HS-7955TG is approved for a123 and LIPO batteries unlike any other of their servos that they don't label as HV servos. If you do a search on the subject you will find other users that have verified this with Hitec. Check out the chief aircraft description of this servo "approved for A123and LIPO batteries". I confirmed this with Mike Mayberry at Hitec yesterday. It is 330 in/oz at 6V and has all titanium gears. It also has all the nice programmable features/parameters like all their 79 series servos. I have been using their HS-7985MG(170in/oz metal gear) servos in my large scale helies for years.
Looking foreward to flying the Epic at Bomber field. See you at bomber