The kit built Senior does not have ailerons and considerable dihedral to give it A very nice handling quality with just rudder The Senior ARF comes with barndoor ailerons and about half the diheral. You can add strip ailerons to the Kit Senior easily and I have done this by cutting off a bit of the trailing edge so that you can get sufficient thickness to install hinges then using full span strips but they will have to be as above around two inchs wide. Which will make the trailing edge of the aileron extend beyond the original trailing edge a about an inch. The torque rods can be installed in the normal trainer fashion.

If you do not reduce the dihedral the roll response will be a little sluggish. If you like and choose not to reduce dihedral a little aileron to rudder mix will impart very pleasent handling. Reducing dihedral will provide much more response.

Barn door ailerons are more work but provide even better handling. It usually involves adding a false spar in front of the cutout to give you something to hinge to and the easiest way to control them is using two aileron servo either on a 'Y' cord or mixed on two channels.

This photo show my Cadet Senior and on this one I used barndoors, reduced dihedral to about one forth of the stock kit Senior dihedral, two servos and you can see the structure through the clear covering.

John