Correct! Throttle requires little torque and the small servo size leaves more room inside while the plane is still lighter. The mini servos in the wings are higher torque units than necessary at 48 oz/in. One standard servo will do (about 42 oz/in). The belcrank linkages and one std servo weighed more than the extensions and two mini servos. I have quite a number of servos and select the servos by what I have available at that time. I mainly use Dymond, Cirrus and Hitec servos. I like dymond servos because of their high torque, price and reliability.
My servo placement was derived by the weight of the engine/tuned pipe, full cowl, and the type of covering job I planned. The .46fx weighs more than the Webra .50 I installed and more of that weight is in the front because of the std muffler. Your engine will have quite a bit of power but not quite the level of this one.
The covering shown on the wing is blue supercoverite. This unpainted material flows better around curves than any film I've tried. When painted it holds up to years of use and still looks good.
You may have commited yourself to something too difficult to do. That banner will be very difficult to handle. Fullsize planes take off and then "hook" their banner for towing, then release it before landing. The larger the plane the easier this task will be. The Dreamer is not a large or docile performer. Without pretty fair piloting skills the plane itself is a handful but with the added complications of the banner it may only be crashworthy.
My ailerons were enlarged slightly rather than installing another set on the upper wing to allow snappier performance. Don't be afraid of those rubberbands, the wings are small. Trying to make these interplaner struts functional will make it harder to transport and much more hassle at the field to set up.
This plane is still not ready to hit the air but should be early in the season. I have too many planes at least this far along and not finished to focus only on this one. I must have at least six or seven air worthy that haven't seen their maiden flight yet. I can only take three or four to the field at a time.