Just make a bay and hatch behind the wing mount former so you can mount the servos or battery pack back further.
But's it's an ARF and i'm not sure if you have all the tools.
it's simple if you have all the tools already and know what you're doing.

You can actaully just mount the servos to the back near the rear stabs like the bigger models. it'll give you better torque and less play.
If it bothers you that much.