RE: sub micro servo on dominator 500
This is nowhere to save cash, in fact you are already doing that by using Hitec. Hs 85's are inadaquate on any of the surfaces. Thinking that metal gear 85's is OK is a mistake. Even metal geared 225's soon become very sloppy and while this may be alright on an airplane that uses very large control throws but certainly not on one that requires very low throws. The result will be very poor centering and an airplane that always hunts on whatever axis that is effected. In this application and yes even the 'Slo Quickees' plastic gears are superior. Fast airplanes with tiny surfaces and low throws centering is vital.
Every Q500 avalible in the US in the last six years are all Two aileron and one servo. Never seen a single aileron Quickee. Some have experimented with two ailrons servos to no advantage except some total weight gain. While this is not a rule book racer. The 85's are less than the required thrust by the rules when run on 4.8 volts for quickees. The rocking problem of the the eighty series is aggrivated by the frequently stiff aileron linkages.
IC I would urge you if you want to really want to enjoy that airplane to use the tried and well proven package used by virtually every racer in the country that are not JR users. And this certainly applies to Slo Quickees.
John