The original Twinstar has decent axial control, or better put,
decent aileron control.. but that is about it,,*decent*...

As I wanted more axial control, very effective flaps,, and the
original ailerons are left uncovered on the ends they soak
up fuel and become nasty,, I decided to slap on a larger aileron
as shown in first pic ..

In order to have aileron and flaps (flaperons) seperate servos
have to be used...
To do this the centered mounted single servo mount was removed
and lite ply was used to make a new mounting for two servos..
Not shown int his pic but to be added later is a balsa spacer
between the two servos.. This is for more of a 'wire loom' to
keep two throttle and two aileron servo wires from getting into
the aileron linkage... They were mounted in stock location so
to hide the servos...
The aileron servos are back further than the original so there
will be less linkage length so less chance of linkage flex.. Where
the original servo was on the CG both or the replacements will
be behind the CG... Remember, we have larger fuel tanks and
larger motors in front og CG that need to be compensated for,,
so rather than add weight to balance lets just move items during
construction to compensate.