It isn't hard to add the servos. The pitch servo lives back in the fuselage behind the baggage bulkhead. The roll servo is mounted in the right wing. Roll servo is a little tighter space to work in, but very doable.
Running the AP wires through the wing might be the hardest part. I would consider updating the Dynons to Skyview. You can find pretty good deals on used equipment here. Dynon sells all of the mounting hardware to make it a bolt on addition.