RE: Lanier Yak
The Giles has considerably smaller ailerons... not only in depth but also width... doesn't go anywhere near the root of the wing, and the servos are designed centered.
With that said, the ailerons on this plane are very sturdy. I think Lanier is being conservative, and when some asks about making a servo bay in the center they are probably imagining all sort of cobbled trays... If a person went to one bay in the center, they'd have to be competant to create a strong servo tray that integrates in the wing well... probbaly double the ribs with a cutout for the rails underneath, and a tray that encompassed the servo and was sheeted to each side rib.
Not for the faint of heart and if you didn't do a good enough job you simply would risk the plane. Even so, this type of mod would be performed withthe understanding that the plane would never be flown fast, but mostly slow 3D and middle speeds through the sky.
You MUST seal the hinges.
Develop ANY slop in the tray, linkage arms or servo gears and the resulting flutter at to high a speed would rip the wing apart. This plane certainly is not much larger than the EF, QQ and other 500cc offerings that use one aileron servo... but they were DESIGNED for one.
They ailerons have some counterbalances on the tips...and I don't know how that might affect the propensity for flutter...
If one performs the mod... I suspect they would need to add at LEAST 1 oz of weight for the bays... resulting in about 4 oz of savings... (with 2 less servos, linkages and extensions) hat's pretty significant if other weight savings mods/upgrades are performed too...
But you are obviously on your own... no complaing back to Lanier if anything happens... noit that it would... but it IS an unkonown until someone does it. Then someone dcould do a good job and another do poorly... with differing results.
I believe I'd be MORE inclined to use Futaba S9350's at a stated 1.4 oz (probably more like 1.6oz) and save 2.5 oz that way... 138.8 oz in ea.